Exoskeleton & Endoskeleton

Exoskeleton (pronounced ek-soh-skel-i-tn)

(1) In zoology, an external covering or integument, any hardened external structure, as the shells of crustaceans or the scales and plates of fishes and reptiles, especially when it is of the nature of bone.

(2) All hard parts, such as hair, teeth, and nails which develop from the ectoderm or mesoderm in vertebrates (generally used only in technical literature).

1841: The construct was exo- + skeleton.  The prefix endo- was used as a word-forming element meaning "inside, within, internal.  It was from the Ancient Greek ἔνδον (éndon) (within; inner; internal) from the primitive Indo-European en-do- (an extended form of the root en (in)).  Skeleton was from the New Latin skeleton (bones, bony framework of the body), from the Ancient Greek skeleton soma (dried-up body, mummy, skeleton), from the neuter of σκελετός (skeletós) (dried up, withered, dried body (and as a noun: parched; mummy), from σκέλλω (skéllō & skellein) (dry, dry up, make dry, parch), from the primitive Indo-European (s)kelha- (to parch, wither); related was the Ancient Greek σκληρός (sklirós) (hard).

Skelton was an early variant form.  The noun use of Greek skeletos passed into Late Latin as (sceletus), hence the French squelette and the rare English skelet (1560s), the Spanish esqueleto & the Italian scheletro.  The meaning "bare outline" was first recorded circa 1600; hence the term "skeleton crew" from 1778 used to describe minimal staffing, the skeleton key a similar allusion to some of a structure being removed.  The phrase "skeleton in the closet" (source of secret shame to a person, family or institution) is from 1812 and thought an adoption from the imagery in Bluebeard fable (1697) by Charles Perrault (1628-1703). Exoskeleton was a creation in 1841 by English paleontologist Sir Richard Owen (1804–1892).

Endoskeleton (pronounced en-doh-skel-i-tn)

(1) In zoology, the internal skeleton or framework of the body of an animal (generally the bony or cartilaginous skeleton of vertebrates).  Certain invertebrates, such as sponges and echinoderms, also have endoskeletons.

(2) For most (non-technical) purposes, a synonym for skeleton.

1838: The construct was endo- + skeleton  The prefix exo- was used as a word forming element in words of Greek origin meaning "outer, outside, outer part" and was used from the mid-nineteenth century.  It’s from the Ancient Greek ἔξω (éxō) (outer; external).and was related to ex (out of).  Endoskeleton is used almost exclusively in the biological sciences.  For most general purposes, it’s synonymous with skeleton which is the default assumption of use because it’s familiar from humans and most familiar animals.  Exoskeleton has become more widely used in recent years because of the interest in fields such as engineering, robotics and medicine in using external structures, often to augment or replace human functions.

Trilobites

Trilobite (pronounced try-low-byte) translates literally as “three lobes".  Often casually referred to as bugs or sea-bugs, in taxonomy, all trilobites actually belong in the class of trilobite in the phylum arthropod and within the class are ten orders.  It’s not known how many species of trilobites existed but almost 21,000 have thus far been identified in the fossil record, their numbers and variety leading them to be regarded as one of history’s more successful animals.  They inhabited all the seas and oceans and endured some three-hundred million years, surviving several mass-extinction events.  Their long duration, their structure and living habits meant they became a common and frequently discovered fossil, noted since antiquity although the first attempt scientifically to classify one seems to have been by Wan Shizen of China who, in 1689 described trylobite pygidia (tails) as batstones.  The first known scientific drawing was by Welsh botanist, the Reverend Edward Lhuyd (1660-1709) whose sketch of a trilobite was published in "The Philosophical Transactions of the Royal Society.  The drawing, now classified as being a Ogygiocarella debuchii, was then (not unreasonably), called the "flatfish".

Truly ancient, trilobites pre-date the Cambrian explosion and went extinct only towards the end of the Permian extinction event which ended the Paleozoic age.  However, the earlier events took their toll, a few orders vanishing after the Ordovician extinction event while the Devonian event removed all but one order, that last survivor dying out in the Great Permian Extinction.  Why such a successful and prolific creature could not endure these extinctions remains a debate.

All share the same basic structure, having three lobes: a left pleural, a middle axial and a right pleural lobe, their bodies divided into a cephalon (dead), thorax (middle), and pygydium (tail).  Trilobites had a thick, protective exoskeleton which formed a hard calcite shell, something like that of the modern crab and is the reason for their frequency in the fossil record, the exoskeletons usually the only part to survive although, in the rare cases where certain surrounding conditions exist, traces of soft tissue such as antennae can survive fossilization.  As a trilobite grew, it molted its exoskeleton, and many of the fossils which exist are molted frames rather than dead creatures.

Endoskeleton cars

The Birdcage: The Maserati Tipo 60/61 (chassis #2549).

Endoskeleton cars are far from uncommon but some make the concept more obvious than others.  The Maserati Tipo 60/61 (1959-1961) gained the nickname “Birdcage” (by which it’s almost always known) because observers were much taken with the delicacy of the construction.  By the late 1950s, space-frames had become familiar to race-car builders but they were usually robust-looking arrangements whereas Maserati had rendered an intricate latticework of some 200 chromoly steel tubes welded often in triangulated form in the points of highest stress, the design delivering both lightness and rigidity.

Mercedes-Benz 300 SLR (W196S, upper) & 300 SL (W198, lower).

One of the reasons the Maserati’s skeleton looked so delicate was that the space-frame had become associated with Teutonic-flavored construction like that used by Mercedes-Benz for its 300 SL & 300 SLR.  Both shared the same method of construction but despite the names and the the visual similarity between the two, there were few common components beyond the nuts, bolts & screws.  The 300 SL (W198; 1954-1963) was a road car while the SLR (W196S; 1955) was a lengthened version of the W196R Formula One Grand Prix car with a sexy body and an enlarged (though somewhat detuned) straight-eight engine.

Exoskeleton cars

MVE Exocet (left) & Exomotive’s Exocet Sport V8 (right).

Exoskeleton vehicles are numerous on farms, mine-sites and such but rarely seen on public roads.  They do though have a niche for those who want something which sacrifices just about everything (aerodynamics, weather protection, doors etc) for the nimbleness only extreme light-weight can deliver.  An example is the MVE Exocet, released for public sale in 2010.  It’s an inventive approach to the kit-car concept and takes the classic front-engined, rear-wheel drive approach, based on Mazda’s Miata (the MX-5, introduced in 1989 and a kind of clone of the Lotus Elan of the 1960s but without the problems), the advantage with the Japanese platform being its unusual sub-frame which permits the removal of the body, leaving the engine, drive-train and suspension as a rolling assembly to be transplanted to the Exocet chassis.

The nicely defined shoulder blade and ribcage definition of Lindsay Lohan's endoskeleton.

Because of the light weight, even when using sensible four-cylinder engines the Exocet delivers high-performance but the Americans in particular can’t resist the idea that just about any car can be improved by the installation of a V8 and quite outlandish power to weight ratios are possible.  An indicative example of Exomotive’s Exocet Sport used a 525 horsepower (LS3) version of one of the later evolutions of the small-block Chevrolet V8 which, fully fueled, weighed in at 1690 lb (767 kg), somewhat less than a 2023 Formula One car.  Because it possible to buy, off the shelf (as a “crate” engine), V8 engines with about the same power as a F1 power-plant generates, although there was be something a weight penalty, the potential does exist to build a two-seater roadster with a similar power-to-weight ratio and there are jurisdictions which even allow such a thing to be registered for use on public roads.  Opinions would differ on whether such a build is a good idea but the little machines, if the V8 was tuned more for low and mid-range torque rather than ultimate power, would seem to have great potential in competitions such as short-course events and hill-climbs although the dubious aerodynamics would render it less suited to high-speed tracks.

Art and money: Porsche 934 by Benedict Radcliffe (US$249,002) and Comedian by Maurizio Cattelan’s (the banana duct-taped to the wall; (US$6.2 million)).

The exoskeleton concept inspired English artist and sculptor Benedict Radcliffe (b 1976) to create a number of small scale tubular steel sculptures in the shape of cars including the Lancia Stratos (1973-1978), Lamborghini Countach (1974-1990) and Ferrari F40 (1987-1992), mostly powdered-coated in lurid colors.  Usually, they sell for several thousand US dollars but in early 2025, one in 1:1 scale in the shape of a Porsche 934 sold for US$249,002.  In a nod to history, it was painted in the same fluro-orange used for the Jägermeister livery used for the race cars in 1979-1977 and rolled on period-correct centre-locking BBS wheels shod with Avon slick tires.  At that price, it was little different from what one would pay for a new Porsche 911 GT3, straight from the showroom floor.  Still, it’s less than the US$1.5 million which is typical of what’s been paid in recent years on the rare occasions a 934 is offered for sale.  Produced between 1976-1977, Porsche built 31 934s, simply for the purpose of creating a version of the 930 (the 911 Turbo, 1975-1978) which would comply with the FIA Group 4 (GT Cars) rules (the 935 was the companion Group 5 (Special Production Cars) project).  The art market cannot be assessed with any form of conventional metrics but in paying a quarter-million odd for a tubular structure, one gets quite a lot compared with the Italian visual artist Maurizio Cattelan’s (b 1960) Comedian, (the banana duct-taped to the wall) which a couple of months earlier had, at auction, realized US$6.2 million.

Underwire

Underwire (pronounced uhn-der-wahyuhr)

(1) A (usually almost semi-circular) metal, plastic or composite “wire” sewn into the underside of each cup of a brassiere, used both as a structural member and shaping device.

(1) A brassiere (or related component in a swimsuit or some other garment) with such wires.

A portmanteau word, the construct being under + wire.  Under is from the Middle English under, from the Old English under, from the  Proto-Germanic under (source also of the Old Frisian under, the German unter, the Old High German untar, the Dutch onder, the Old Norse undir, the Gothic undar and the Danish & Norwegian under), from a blend of the primitive Indo-European n̥dhér (under) and n̥tér (inside).  It was akin to the Old High German untar (under), the Sanskrit अन्तर् (antar) (within) and the Latin infrā (below, beneath) & inter (between, among), influencing also the Sanskrit adhah (below), the Avestan athara- (lower) and the Latin infernus (lower).  The Old English under was a preposition in the sense of "beneath, among, before, in the presence of, in subjection to, under the rule of, by means of and also an adverb in the sense of "beneath, below, underneath," expressing position with reference to that which is above, usage gained from the Proto-Germanic under-.

Under proved as productive a prefix in Old English as had in German and Scandinavian languages, often forming words modeled on Latin ones using “sub-“ and the notion of "inferior in rank, position etc" existed in the Old English and persists in the language of the titles in the UK’s civil service to this day (eg under-secretary).  The idea of it being used as descriptor of standards (less than in age, price, value etc” emerged in the late fourteenth century whereas, as an adjective meaning “lower in position; lower in rank or degree” was known as early as the 1200s.  Mysteriously, the use in Old English as a preposition meaning "between, among," as in “under these circumstances” may be a wholly separate root (eg understand).  The phrase “under the weather (indisposed; unwell) is from 1810.  Under the table was used from 1913 in the sense of "very drunk" and it wasn’t until the 1940s (possibly influenced by the onset of rationing and the consequence emergence of black markets) it came to enjoy the sense of something "illegal" (although the long-extinct “under-board: (dishonest) is attested from circa 1600.  To keep something under the hat (secret) is from 1885 and use seems not to have been affected by the post 1945 decline in hat-wearing; to have something under (one's) nose (in plain sight) is from 1540s; to speak under (one's) breath (in a low voice) dates from 1832.

Wire is from the Middle English wir & wyr (metal drawn out into a fine thread), from the Old English wīr (wire, metal thread, wire-ornament), from the Proto-Germanic wira- & wīraz (wire), from the primitive Indo-European wehiros (a twist, thread, cord, wire), from wei & wehiy- (to turn, twist, weave, plait).  The Proto-Germanic wira- & wīraz were the source also of the Old Norse viravirka (filigree work=), the Swedish vira (to twist) and the Old High German wiara (fine gold work).  A wire as marking the finish line of a racecourse is attested from 1883; hence the figurative down to the wire.  Wire-puller in the political sense dates from 1839, an invention of American English (though used first to describe matters in the UK’s House of Commons), based on the image of pulling the wires that work a puppet; the phrase “pulling the strings” replaced “pulling the wires” late in the nineteenth century.

Casting a practiced eye: Lindsay Lohan assessing the underwires.

In the technical sense familiar to a structural engineer, the bra’s underwire is a specific instance of the earlier verb (1520s) “undergird”, the construct being under + gird.  Gird (to bind with a flexible rope or cord; to encircle with, or as if with a belt) was from the Middle English girden, gerden & gürden, from the Old English gyrdan (to put a belt around, to put a girdle around), from the Proto-Germanic gurdijaną (to gird), from the primitive Indo-European gherdh.  It was cognate with the West Frisian gurdzje & girdzje, the Dutch gorden, the German gürten, the Swedish gjorda, the Icelandic gyrða and the Albanian ngërthej (to tie together by weaving, to bind).  The related forms were undergirded & undergirding.

As a familiar mass-manufactured commodity item, the bra is a relatively new innovation although many of the various functionalities afforded to the wearer are noted in illustrations and surviving garments worn since antiquity, interest in the physics of gravity long pre-dating Newtonian mechanics.  The most obvious immediate ancestor, the corset, began to be widely worn by the late 1400s, the shaping and structure of many underpinned by struts made either of metal or, more commonly, animal bone, a method of construction which, in simplified form, would later return as the underwire.  The first patent issued for a recognizably modern bra was issued in New York in 1893 for a “breast supporter” and it included all the features familiar in the mass-produced modern product: separated cups atop a metal support system, located with a combination of shoulder straps and a back-band fastened by hook and eye closures.  On the basis of the documents supplied with the patent application, the design objective was for something not only functional and practical but, unlike the often intimidating corsets then in use, also comfortable.

It was an immediate success although, lacking the capacity to manufacture at scale and unwilling to become involved in the capital raising which that would have demanded, the inventor sold her patent to the Warner Brothers Corset Company for US$1500 (at a time when a new Ford car cost around US$400).  Warner Brothers Corset Company (later Warnaco Group, in 2012 acquired by Phillips-Van Heusen Corporation (PVH), which over the life of the patent is estimated to have booked profits of almost US$40 million from its bra sales, got a bargain.  English borrowed the word brassiere from the French brassière, from the Old French braciere (which was originally a lining fitted inside armor which protected the arm, only later becoming a garment), from the Old French brace (arm) although by then it described a chemise (a kind of undershirt) but in the US, brassiere was used from 1893 when the first bras were advertised and from there, use spread.  The three syllables were just too much to survive the onslaught of modernity and the truncated “bra” soon prevailed, being the standard form throughout the English-speaking world by the early 1930s.  Curiously, in French, a bra is a soutien-gorge which translates literally and rather un-romantically as "throat-supporter" although "chest uplifter" is a better translation.  The etymological origin of the modern "bra" lying in a single garment is the reason one buys "a bra" in the same department store from which one might purchase "a pair" of sunglasses or shoes.

The booming popularity of the bra in the 1920s and 1930s encouraged innovation and not a few gimmicks and it was in this era that manufacturers first began to develop systems of cup sizes although there was there no standardization of dimensions and, technically, that’s still the case with remarkable variations between manufacturers; it’s an industry crying out for an ISO.  It was in 1931 a patent was issued for what was described as a bra with a pair of integrated “open-ended wire loops”, semi-circular pieces of metal enclosed in protective fabric which partially encircled each breast, sitting against the chest-wall at the bottom of the breasts.  This is the origin of the modern underwire and during the 1930s, while designers would develop more elaborate versions, the concept didn’t change and as late as 1940, the underwire bra remained something of niche product being, at this stage of development, both more expensive and often less comfortable.  Wartime necessity also imposed an evolutionary delay, the use of metal during wartime being limited to essential production and carefully rationed.  Bras by then probably had become essential but apparently not underwired bras.

Vaquera’s crew neck T-shirt with trompe l'oeil underwear.  Despite the model’s expression (it’s part of their training for the catwalks), the look really should be worn for fun.  The skin-tone of the legs is because of tights, not Photoshopping.

The underwire can even be virtualized.  The technique called Trompe-l'œil (from the French and literally “trick the eye” describes an optical illusion created by rendering on a two-dimensional surface something which appears as a three-dimensional object and the trick had been around for millennia when first the term was used in 1800 by French artist Louis-Léopold Boilly (1761-1845) for a painting he exhibited in the Paris Salon.  While it wasn’t for a few decades trompe-l'œil (usually in English as trompe l'oeil) was accepted by the academy as a legitimate part of high-art, architects and interior decorators continued to exploit the possibilities and the term entered their lexicons.  It has of course for years also been used in the prints on T-shirts but of late this has extended to depictions of underwear.  For most of the twentieth century, the sight of an exposed bra strap was a social faux pas, Vogue and other dictators of fashion publishing helpful tips recommending (for the well-organized) sewing on Velcro strips and (for everyone else) the industry’s DLR (device of last resort): the safety pin.  By the 1980s things had changed and the bra emerged as a fashion piece which might in part (or even in whole) be displayed.  It’s a look which waxes and wanes in popularity but one which has never gone away although it’s one of those things where ageism remains acceptable: beyond a certain age, it shouldn’t be used.  Now, fashion houses are promoting trompe l'oeil bras, knickers and other underwear printed on T-shirts, one attraction being it’s possible to create depictions of garments with an intricacy and delicacy not possible IRL (in real life).

Hughes H-4 Hercules (Spruce Goose) on its only test flight, 2 November 1947, Long Beach, Los Angeles Harbor.  It flew for abou1 1 mile (1.6 km) and achieved a maximum speed of 135 mph (217 km/h).

Howard Hughes (1905—1976), the industrialist knew about the wartime limits on the use of metals because the War Production Board had insisted his H-4 Hercules, a huge, eight-engined flying boat designed to transport 750 troops across the Atlantic, be built using “non-strategic materials" which precluded the industry’s preferred aluminum, Hughes using birch wood almost exclusively.  The H-4, which wasn’t completed until after the end of hostilities flew, briefly, only once and was nicknamed the Spruce Goose, which obviously was arboreally inaccurate but thinking of something as funny and rhyming with “birch” wasn’t easy.  So, in 1942 Hughes knew he’d never get approval for enough metal for his big flying boat, but in 1941, before the entry of the US into the war, more than enough metal was available to create a specialized part to be used in another of his ventures: film director.

Jane Russell, promotional picture for The Outlaw (1941).

In 1941, while filming The Outlaw, Hughes wasn’t satisfied with what sympathetic lighting, camera angles and provocative posing could make of Jane Russell's (1921—2011) bust.  A skilled engineer, he quickly designed and had fabricated a kind of cantilevered underwire bra to lend the emphasis he though her figure deserved.  What Hughes did was add curved steel rods which functioned as actual structural members, sewn into the bra under each cup and connected to the shoulder straps, an arrangement which simultaneously pushed upwards the breasts and allowed the shoulder straps to be re-positioned, exposing to the camera much more skin.  In engineering terms, it was a device which achieved a fixture with no visible means of support.  Hughes was delighted with the result and completed filming though it wasn’t until much later Ms Russell revealed the cantilevered device was so uncomfortable she wore it for only a few minutes, reverting to her own bra which, to please Hughes, she modified with those trusty standbys, padding and a judicious tightening of the straps.  The result was much the same and Ms Russell waspishly added that the engineering prowess which had served Hughes well in aviation didn’t translate well to designing comfortable underwear.  The Outlaw was completed in February 1941 but, because of the focus on Ms Russell's breasts, faced opposition in obtaining the required certificate of release from the Motion Picture Producers and Distributors of America (the MPPDA which administered the Hays Code) which was demanding cuts to thirty seconds odd of offending footage.  Hughes reluctantly complied and there was a brief showing in 1943 but the film’s distributer, unwilling to be dragged into any controversy, withdrew from the project and it wasn’t until 1946 there was finally a general release on cinema screens.  Given the pent-up demand, it was a commercial success but the critics were at the time unimpressed and it only later gained a cult following, at least partly on the basis of the gay undertone in the plot-line.

Lindsay Lohan in underwired demi-cup bra, photoshoot by Terry Richardson (b 1965) for Love Magazine, 2012.  The "demi-cup look" can be achieved by choosing a bra with the correct band size and a smaller cup.  Someone who usually wears a full-cup 32D would use a 32C or even 32B to get the effect although, given the variation in cup shapes between manufacturers, some experimentation will likely be required and fitters caution this should be done in a physical store rather than shopping on-line. 

Underwires essentially fulfill part of the function of an exoskeleton in that, being designed to fit snugly against the ribcage, they provide a basic mechanism of location which means the back-strap, cups and shoulder-straps can provide the shape and support without having to compensate for excessive movement or changes in weight distribution.  The mathematics of structural engineering is really that of making push equal pull and what a well-designed (and properly fitted) underwire does is minimize the risk of movement in an unwanted direction (down) so the least energy is required to maintain the desired movement (up).  There are other ways of achieving this but such constructions typically are much bulkier and use often stiff, unaccommodating fabrics and thick straps.  The underwire is a simple technology which, in the abstract really can’t be improved upon although there are problems.  Washing machine service technicians note the frequency with which errant underwires end up in the mechanism and, being metal, damage can result.  For this reason, most bra manufacturers recommend they be placed in a sealed bag for washing.  Detachment can also happen while in use, a protruding underwire sometimes passing through the material in which its supposed to remain enclosed, giving the wearer a painful jab in a soft, fleshy spot.  Although the tips are usually plastic coated, repeated jabbing is still uncomfortable.  Being traditionally made of metal (usually stainless steel) brings it's own issues, most obviously with metal detectors but for frequent flyers, bras with plastic underwires (and hooks & clasps) are available off the shelf and plastic underwires are even sold as stand-alone part-numbers to modify existing models or for use by the small but devoted class of users who make their own.

Not all underwires are created equal: The Lingerie Addict explains.

Bra underwires typically are made from a non-ferrous metal (inside a plush casing surrounding the cup) such as stainless steel although there are some fabricated from some form of plastic which had appeal for frequent flyers not wanting to trigger the metal detectors at airports and a perhaps unanticipated market sector was among lawyers visiting prisons.  Although they might be presumed to achieve their structural effect by virtue of their rigidity, underwires actually have in them a very slight “spring” so they will splay just a fraction of an inch as the bra moves, something which enhances comfort and fit.  In that sense, an underwire can be thought of as a “torsion bar” which essentially is an unwound spring stretched straight.  The underwire has two functions: (1) to provide the superstructure with a secure location against the ribcage and (2) to distribute forces (downward, upward & lateral) in the same way the cables on a suspension bridge (which connect the towers to the deck) transfer the downward force from traffic up the cables to the towers, diffusing and distributing the stresses to the strongest point.  In a bridge, that’s the tower which, being anchored to the earth, means the forces end up moving from the structure to the ground while in a bra, they’re absorbed partially by the frame (mostly the band if well-designed and also to the shoulder straps if not) and partially by the wearer’s ribcage.  Manufacturers also use the comparison with bridges to illustrate the inherent limitation (at least when dealing with mass above a certain point) of wire-free construction.  Usually, they compare the wire-free design with a simple “rope bridge”, anchored on each side of the waterway or gap crossed but which sinks down as weight (which manifests as downward pressure) is applied.  The physics of this is that because there is no rigid support infrastructure to transfer the downward pressure away from the deck, there’s a direct relationship between the downward pressure and the sag of the deck.  For that reason, it’s important to distinguish between wire-free bras which are little more than an underwire bra without an underwire and those using a design which emulates what an underwire does, usually with a layered array of thicker, stiffer materials in the band and the lower parts of the cup.  In theory such an approach can achieve the same level of support as the most formidable underwire bra but the level of rigidity in the structure would likely render such a creation too uncomfortable to be tolerated by most although variations of the idea are used in short-duration sports such as boxing.

Playtex 18Hour (4745) wire-free bra (left) and 1996 Dodge Viper RT/10 fitted with car bra.  Car bras are also wire-free. 

Although common, not all bras use an underwire, the “wire-free” design used for a number of reasons.  For those with small breasts who require something merely decorative or desire only coverage rather than support, the wire-free bras are a popular choice and the majority of sports bras also use other methods of construction.  Like just about any form of engineering, there are trade-offs, the advantages gained in not using an underwire needing to be assessed by wearers considering whether they outweigh (sometimes literally) whatever limitations may be imposed.  Sometimes, the wire-free devices are marketed as a niche product such as maternity, nursing, post surgical or nightwear (ie a bra for sleeping in, it really does seem a thing).  However, modern materials and forms of reinforcing do make the wire-free bra a viable choice for a wide range of wearers although the physical dimensions of the fabric do tend to be greater (the frame, straps etc), the principle much the same as when aluminium is used for an engine block rather than cast iron, the volume of the lighter material needing to be greater to compensate for its reduced strength.  In a sign of the times, although historically bras without an underwire often were advertised as “wireless”, the ubiquity of the word to describe various forms of digital connectivity (over WiFi, Bluetooth etc) means the industry has shifted mostly to calling them “wire-free” which may seem unnecessary given few would confuse a bra with a router but the internet-enabled bra can be only a matter of time so it’s good manufacturers are thinking ahead.  IT nerds actually already have proved they can deal with linguistic overlap and know about BRAS (broadband remote access server, known also as BBRAS or B-RAS), a device which routes traffic to and from devices such as the ominous sounding DSLAMs (digital subscriber line access multiplexer) on an ISP’s (Internet Service Provider).

1989 Porsche 911 Silver Anniversary with car bra and mirror bras.

The Silver Anniversary edition was released in 1989 to mark the 25^th year of 911 production, a run of 500 (300 coupés & 200 cabriolets) made available for the US market.  Available only in metallic paint (silver or satin black), all were trimmed in silk grey leather with black accent piping & silk grey velour carpeting.  In the usually way these things are done, the package included a bundle of options including a stitched leather console with an outside temperature gauge and a CD or cassette holder, a limited-slip differential, a short shifting gear lever and the inevitable “25^th Anniversary Special Edition” badges, stamped in bronze.

The other wire-free bras are “car bras” (hyphenated and not).  Car bras are “protective garments”, vinyl covers designed to fit snugly over the front of a vehicle, stopping stones or other debris chipping the paint.  Their origin appears to lie in the “cover masks” used by car-manufacturers in the 1970s as a means of concealing the appearance of vehicles being tested (a “shake-down” the preferred phrase) on closed tracks or public roads prior to their release and the purpose was to stop photographers getting pictures of upcoming models to sell to magazines, anxious to scoop the competition with news of what would soon be in the showrooms.  The practical advantages however were obvious and in the 1980s when chrome plated bumpers began rapidly to disappear (replaced by painted surfaces), stone chips became more of an issue, the vulnerable frontal area in many cases more than tripled.

Wire-free: Covercraft's "Lebra" car bra for 2010-2013 Chevrolet Camaro.

The early implementations of the car bra were utilitarian but those who were (1) obsessive about such things, (2) drove frequently on roads where stone damage was more common or (3) owned a vehicle with a design which made such damage more likely (the Porsche 911 a classic example) were soon able to buy vinyl (nearly always black) covers which came to be called “car bras”.  In the 1980s they were very popular and, like any bra, the better ones were both easy to fit and fitted well but problems were soon observed, notably the trapping of moisture which, in conjunction with dust or tiny fragments of stone which tended to be caught around the edges, acted as a kind of sandpaper as the vinyl moved slightly while the vehicle was in motion; over time, this could damage the paint, the very thing the car bra was there to prevent; as bra-wearing women well know, chafing can be a problem.  For that reason, car bras fell from favour, especially as paint technology improved with finishes becoming more durable and less susceptible to being chipped.  Additionally, clear protective coatings became available which offered “extra layers” undetectable by the naked eye and by the time adhesive “wraps” (opportunistically now also marketed as "clear bras") in just about any color became a thing, the appeal of the car bra diminished although they remain available and the newer versions have been revised to reduce "chafing".  However, unlike other symbols of the 1980s (leg-warmers, shoulder pads et al), a revival of the fashion seems unlikely.  Car bras don’t use an underwire but some of the advertising does have something in common with the underwear business, one manufacturer listing some of the features of their car bra as including (1) double padding to prevent wear-thru, (2) a top double-stitch for better body-hugging fit and (3) double-covered & reinforced hooks which won’t scratch.  The available materials include both the basic vinyl and “textured carbon fibre vinyl”.

Vermiform

Vermiform (pronounced vur-muh-fawrm)

Resembling or having the long, thin, cylindrical shape of a worm; long and slender.

1720-1730: From the Medieval Latin vermiformis, the construct being vermis (worm) + forma (form).  Vermis was from the primitive Indo-European wr̥mis and cognates included the Ancient Greek ῥόμος (rhómos) and the Old English wyrm (worm (which evolved into the Modern English worm)).  Form was from -fōrmis (having the form of), from fōrma (a form, contour, figure, shape, appearance, looks).  The root of the Latin vermis was the primitive Indo-European wer- (to turn, bend), an element most productive, contributing to: adverse; anniversary; avert; awry; controversy; converge; converse (as the adjectival sense of "exact opposite”); convert; diverge; divert; evert; extroversion; extrovert; gaiter; introrse; introvert; invert; inward; malversation; obverse; peevish; pervert; prose; raphe; reverberate; revert; rhabdomancy; rhapsody; rhombus; ribald; sinistrorse; stalwart; subvert; tergiversate; transverse; universe; verbena; verge (as the verb meaning "tend, incline"); vermeil; vermicelli; vermicular; vermiform; vermin; versatile; verse (in the sense of the noun "poetry") version; verst; versus; vertebra; vertex; vertigo; vervain; vortex; -ward; warp; weird; worm; worry; worth (in the adjectival sense of "significant, valuable, of value") worth (as the verb "to come to be"); wrangle; wrap; wrath; wreath; wrench; wrest; wrestle; wriggle; wring; wrinkle; wrist; writhe; wrong; wroth & wry.  Vermiform is an adjective.

Commonly used in medicine to describe the appendix, Modern French also gained the word from Latin as the adjective vermiforme (plural vermiformes), the spelling of the medical use apéndice vermiforme (plural apéndices vermiformes).  The only known derived form in English is the adjective subvermiform, used apparently exclusively in the disciplines of zoology, including entomology.  The meaning was defined in a dictionary from 1898 as “shaped somewhat like a worm” which is surprisingly imprecise for the language of science but that vagueness appears adequate for the purposes to which it’s put.  For whatever reason, vermiform was a word much favored by the US humorist HL Mencken (1880-1956).

The female Eumillipes persephone: 1,306 legs & 330 segments.  

Because the scientific literature has for some time been dominated by COVID-19 and all that flowed the brief, sudden prominence of two vermiform creatures, one ancient, the other more recent, was an amusing distraction.  The younger animal was a new species of millipede which boasted not only more legs than any other creature on the planet but was the first of its kind to live up to its name.    

Since circa 1600, the term millipede has been applied to any of the many elongated arthropods, of the class Diplopoda (a taxonomic subphylum within the phylum Arthropoda (the centipedes, millipedes and similar creepy-crawlies) with cylindrical bodies that have two pairs of legs for each one of their many body segments and, although milliped was long regarded as the correct spelling by scientists who work with myriapods, millipede is by far the most common form in general use (although there’s the odd specialist who insists on millepede).  Millipede was from the Latin millipeda (wood louse), the construct being mille (thousand) + pes (genitive pedis) (foot), from the primitive Indo-European root ped (foot) (probably a loan-translation of Greek khiliopous).  When named, it wasn’t intended as a mathematically precise definition, only to suggest the things had lots of legs though, certainly many fewer than a thousand.  The creature has always possessed a certain comical charm because, despite having usually twice the number of legs as centipedes, the millipede is entirely harmless whereas there are centipedes which can be quite nasty.  For centuries millipede was thought a bit of a misnomer, with no example ever observed with more than 750 legs and that deep-soil dweller was an outlier, most having fewer with a count in two figures quite common.  The new species also lives in the depths: Eumilipes persephone (Persephone, the daughter of Zeus who was taken by Hades to the underworld), a female was found to be sprouting 1,306 legs.  Pale and eyeless, it’s vermiform in the extreme, the body-length almost a hundred times its width and instead of vision, it used a large antennae to navigate through darkness to feed on fungi.

The sheer length of the thing does suggest a long lifespan by the standards of the species, most of which tend not to survive much beyond two years.  The persephone however, based on a count of the body segments which grow predictably in the manner of tree rings, seems likely to live perhaps as long as a decade.  One factor which accounts for the longevity is the absence of predators, the persephone’s natural environment banded iron formations and volcanic rock some 200 feet (60 m) beneath the surface of a remote part of Western Australia.  Entomologists didn’t actually venture that deep to explore, instead using the simple but effective method of lowering buckets of tempting vegetation down shafts drilled by geologists exploring for minerals, returning later to collect whatever creatures had been tempted to explore.

Artist’s impression of an Arthropleura: half a metre wide and perhaps nearly three metres in length, the latter dimension similar to a small car.  

Days after the announcement from the Western Australian desert, livescience.com also announced researchers in the UK found the fossilized exoskeleton of an Arthropleura, the largest arthropod yet known to have lived.  The length of a modern car, the giant millipede-like creatures appear to have done most of their their creeping and crawling during the Carboniferous Period, between 359 million and 299 million years ago.

Although the Arthropleura have long been known from the fossil record, there’d not before been any suggestion they ever grew quite so large and the find was quite serendipitous, discovered on a beach in a block of sandstone which had recently fallen and cracked apart.  The exoskeleton fragment is 30 inches (750 mm) long and 22 inches (550 mm) wide which means the giant millipede would have been around 102 inches (2600 mm) long and weighed around 110 lbs (50 kg)m making it the biggest land animals of the Carboniferous era.  Despite its bulk however, the physics of movement and the need to support its own weight mean the leg count is nowhere near as impressive as its young relation what is now on the other side of the world (what are now the Australian and European land masses were closer together during the Carboniferous) and it’s still not clear if Arthropleura had two legs per segment or every two segments but either way it adds up to much fewer than a hundred.

Ultimately, Arthropleura was a victim of changing conditions.  In its time, it would have been living in a benign equatorial environment but, over millions of years, the equator can shift because of the phenomenon of TPW (true polar wander) in which the outer layer of Earth shifts around the core, tilting the crust relative to the planet’s axis.  This last happened some eighty-four million years ago.  So, the conditions which for so long had been ideal changed and changed suddenly and Arthropleura was unable to adapt, going extinct after having flourished for nearly fifty-million years.  The reasons for their demise are those seen repeatedly in the fossil record: In an abruptly changed environment, there was suddenly more competition for fewer resources and the Arthropleura lost out to animals which were stronger, more efficient and better able to adapt.

The human appendix.

Thousands of years after first being described, the human appendix, a the small blind-ended vermiform structure at the junction of the large and the small bowel remains something of a mystery.  For centuries the medical orthodoxy was it vestigial, a evolutionary dead-end and a mere quirk of human development but the current thinking is it exists as a kind of “safe-house” for the good bacteria resident in the bowel, enabling them to repopulate as required.  However, being blind-ended, although intestinal contents easily can enter, in certain circumstances it can operate as a kind of one-way, non-return valve, making exit impossible which results in inflammation.  This is the medical condition appendicitis and in acute cases, the appendix must surgically be removed.  That's usually fine if undertaken in good time because it's a simple, commonly performed procedure but unfortunately, in a small number of cases, a residual "stump" of the structure may escape the knife and in this inflammation may re-occur, something surgeons resentfully label “stumpitis”.  Apparently the most useless part of the human anatomy, there is noting in the medical literature to suggest anyone has noticed any aspect of their life being changed by not having an appendix.

Foxbat

Foxbat or fox-bat (pronounced foks-bat)

(1) NATO reporting name for the MiG-25 (Mikoyan-Gurevich MiG-25) high-altitude supersonic interceptor and reconnaissance aircraft.

(2) A common name for members of the Megachiroptera (the Pteropus (suborder Yinpterochiroptera), a genus of megabats), some of the largest bats in the world.

Fox is from the Middle English fox, from the Old English fox (fox), from the Proto-West Germanic fuhs, from the Proto-Germanic fuhsaz (fox), from the primitive Indo-European púḱsos (the tailed one), derive possibly from puḱ- (tail).  It was cognate with the Scots fox (fox), the West Frisian foks (fox), the Fering-Öömrang North Frisian foos, the Sölring and Heligoland fos, the Dutch vos (fox), the Low German vos (fox), the German Fuchs (fox), the Icelandic fóa (fox), the Tocharian B päkā (tail, chowrie), the Russian пух (pux) (down, fluff), the Sanskrit पुच्छ (púccha) (source of the Torwali پوش‎ (pūš) (fox) and the Hindi पूंछ (pūñch) (tai”).

Bat in the context of the animal was a dialectal variant (akin to the dialectal Swedish natt-batta) of the Middle English bake & balke, from the North Germanic. The Scandinavian forms were the Old Swedish natbakka, the Old Danish nathbakkæ (literally “night-flapper”) and the Old Norse leðrblaka (literally “leather-flapper”).  The Old English word for the animal was hreremus, from hreran (to shake) and it was known also as the rattle-mouse, an old dialectal word for "bat", attested from the late sixteenth century.  A more rare form, noted from the 1540s, was flitter-mouse (the variants were flinder-mouse & flicker-mouse) in imitation of the German fledermaus (bat) from the Old High German fledaron (to flutter).  In Middle English “bat” and “old bat” were used as a (derogatory) term to describe an old woman, perhaps a suggestion of witchcraft rather than a link to bat as "a prostitute who plies her trade by night".  It’s ancient slang and one etymologist noted the French equivalent hirondelle de nuit (night swallow) was "more poetic".  To “bat the eylids” is an Americanism from 1847, an extended of the earlier (1610s) meaning "flutter (the wings) as a hawk", a variant of bate.

The term fox-bat or flying fox, (genus Pteropus), covers some sixty-five bat species found on tropical islands from Madagascar to Australia and noth through Indonesia and mainland Asia.  Most species are primarily nocturnal and are the largest bats, some attaining a wingspan of 5 feet (1.5 m) with an overall body length of some 16 inches (400 mm).  Zoologists list fox-bats as “Old World fruit bats” (family Pteropodidae) that roost in large numbers and eat fruit and are thus a potential pest, many countries restricting their importation.  Like nearly all Old World fruit bats, flying foxes use sight rather than echolocation, a physiological process for locating distant or invisible objects (such as prey) by means of sound waves reflected back to the emitter by the objects) to navigate, despite the largely nocturnal habit of most species.  In the database maintained by the International Union for Conservation of Nature and Natural Resources (IUCN), about half of all flying fox species are listed as suffering declining populations, 15 said to be vulnerable and 11 endangered. The fox-bats were previously classified in the suborder Megachiroptera, but most researchers now place them in the suborder Yinpterochiroptera, which also contains the superfamily Rhinolophoidea, a diverse group that includes horseshoe bats, trident bats, mouse-tailed bats, and others.

MiG-25 (Mikoyan-Gurevich MiG-25).

Once the most controversial fighter in the skies, there was so much mystery surrounding the MiG-25 that US, British and NATO planners spent years spying on it with a mixture of awe, fear and dread.  Conceived originally by USSR designers to counter the threat posed by Boeing’s B-70 Valkyrie bomber, development continued even after the B70 project, rendered redundant by advances in missile technology, was cancelled.  First flown in 1964 and entering service in 1970, nearly 1200 were built and were operated by several nations as well as the USSR.  Able (still) to outrun any other fighter, only the US Lockheed SR-71 Blackbird was faster but fewer than three dozen of those were built and those were configured only for strategic reconnaissance.  When first the West became aware of the Foxbat, it caused quite a stir because, combining stunningly high speed with high altitude tolerance and a heavy weapons load, it did appear to be the long-feared platform which would render Soviet airspace immune from US penetration.  It was the threat the Foxbat was thought to pose which was influential in the direction pursued by US engineers when developing the McDonnell Douglas F15.

The Foxbat however never realized its apparently awesome implications. Because the original design brief was to produce a device which could combat the fast, high-flying B-70, many of the characteristics desirable in a short-range interceptor were neglected in the quest for something which could get very high, very quickly.  At that it was a breath taking success but there were compromises, the fuel burn was epic and, with a very high take-off and landing speed, it could operate only from the longest runways.  Still, at what it was good at it was really good and its very presence meant the US had to plan any mission within range of a Foxbat, cognizant of the threat it was thought to present.  Unbeknown to the West, at lower altitudes it presented little threat and was no dog-fighter; it was essentially a dragster built for the skies, faster than just about anything in a straight line but really not good at turning.

It wasn’t until 1976 when a Soviet defector landed a new Foxbat in Japan in 1976 that US engineers were able to examine the airframe and draw an understanding of its capabilities.  What their analysis found was that the limitations in Soviet metallurgy and manufacturing techniques had resulted in a heavy airframe, one which really couldn’t maneuver at high speeds, and handled poorly at low altitudes. The surprisingly primitive radar was of limited effectiveness in conventional combat situations against enemy fighters, which, combined with the low altitude clumsiness meant that its drawbacks tended to outweigh the advantage it had in sheer speed at altitude, something which meant less to the US since missiles had replaced the B-70 strategic bomber (which never entered production).

In its rare combat outings, those advantages did however confer the occasional benefit.  In 1971, a Soviet Foxbat operating out of Egypt used its afterburners to sustain Mach 3 for an extended duration, enabling it to outrun three pursuing Israeli F4-Phantoms and one downed a US Navy F/A-18 Hornet during the first Gulf War (1991).  During the Iran-Iraq War (1980-1988), the Iraqi Air Force found them effective against old, slow machinery but sustained heavy losses when confronted with the Iran’s agile F-14 but most celebrated was probably the Foxbat’s success during the Gulf War in claiming both of the last two American aircraft lost in air-to-air combat.  Otherwise, the Foxbat has at low altitude proved vulnerable, the Israeli Defense Force (IDF) shooting down several in the war over Lebanon (1981) although they have of late been used, most improbably, in a ground attack role in the Syrian Civil War, the Syrian Arab Air Force, lacking a more appropriate platform, pressing the Foxbats into a ground support role, in at least one case using air-to-air missiles to attack ground targets.  The Soviet designers took note of the operating environment when developing the Foxbat’s successor, the MiG-31 (NATO reporting name Foxhound), a variant which sacrificed a little of the pure speed and climb-rate in order to produce a better all-round fighter.

Usually unrelated: 1957 Morris Minor Traveller (left) and 1960 Jaguar XK150 FHC (right).  Stations wagons with wood frames (real and fake) ate in the US called "woodies" but the spelling "woody" also appears in UK use.

Although for the whole of the Jaguar XK150’s production run (1957-1961) the Morris Minor Traveller (1952-1973) was also being made in factories never more than between 20-60 odd miles (32-100 km) distant, so different in form and function were the two it’s rare they’re discussed in the same context.  One was powered by an engine which had five times won the Le Mans 24 hour endurance classic while the other was one of several commercially-oriented variants of a small, post-war economy car, introduced in the austere England of 1948.  The Traveller did however have charm and it was also authentic in its construction, the varnished ash genuinely structural, an exoskeleton which provided the strength while the panels behind were there just to keep out the rain.  By contrast, by the mid-1950s, the US manufacturers had abandoned the method and produced “woodies” with a combination of fibreglass (fake timber) and DI-NOC, (Diurno Nocturna, from the Spanish, literally “daytime-nighttime” and translated for marketing purposes as “beautiful day & night”) appliqué, an embossed vinyl or polyolefin material with a pressure-sensitive adhesive backing produced since the 1930s and perfected by Minnesota Mining & Manufacturing (3M).  In phased releases over 1957-1958, Jaguar made available the usual three versions of its XK sports car, the DHC (drophead coupé, a style which elsewhere was usually called a cabriolet or convertible) and FHC (fixed head coupé, ie coupé), later joined by the more minimalist OTS (open two-seater, a roadster) and the line was a link between flowing lines of the 1930s and the new world, celebrated by the E-Type’s sensational debut at the 1961 Geneva Motor Show.

Minor modification: 1960 Jaguar XK150 3.4 Shooting Brake (“Foxbat”).

The Morris Minor Traveller was the last true woodie in production and is now a thing in the lower reaches of the collector market but there's one less available for fans because one was sacrificed to a project by by industrial chemist and noted Jaguar enthusiast, the late Geoffrey Stevens, construction undertaken between 1975-1977. He wanted the Jaguar XK150 shooting brake the factory never made so blended a XK150 FHC with the rear compartment of a Morris Minor Traveller of similar vintage.  Mr Stevens in 1976 dubbed his hybrid creation “Foxbat” because just as a Mig-25 landing in Japan was an event so unexpected it made headlines around the world, he suspected that in the circles he moved, a timber-framed XK150 shooting brake would be as much a surprise.  It has been restored as a charming monument to English eccentricity and even the usually uncompromising originality police among the Jaguar community seem fond of it.  In a nice touch (and typical of an engineer’s attention to detail), a “Foxbat” badge was hand-cut, matching the original Jaguar script.  Other than the coach-work, the XK150 is otherwise “matching-numbers” (chassis number S825106DN; engine number V7435-8).   

On the Wings of a Russian Foxbat: Deep Purple bootleg, 1977.

The origin of the term “bootlegging” dates from the late eighteenth century when it was used by British customs and excise officers to describe the trick smugglers used hiding valuables in their large sea-boots.  Since then, it’s been applied variously including (1) the distilling, transporting and selling of unlawful liquor (2) unlicensed copies of software and (3) unauthorized recordings of music and film.  In music, bootleg recordings began to appear in some volume in the 1960s and originally were often from live performances.  Often created from tapes of dubious quality with little or no editing, these bootlegs generally were tolerated by the industry because they tended to circulate among fans who anyway purchased the official product and were thought of just a form of free promotional material.  Later, when things became more organized and bootleggers began distributing replicas of official releases, the attitude changed and for decades the software industry fought ongoing battles against bootleg copies (which in some non-Western markets represented in excess of 90% of installations).

On the Wings of a Russian Foxbat, re-released (in re-mastered form with bonus tracks) in 1995 as Live in California, Long Beach Arena, 1976.

Taken from a performance by the English heavy metal band Deep Purple at the Long Beach Arena, Los Angeles on 27 February 1976, the bootleg On the Wings of a Russian Foxbat was released in 1977 and was another example of the effect on popular culture of the Soviet pilot’s defection.  The link with the event in Japan was that the quality of the band’s performance was unexpectedly good, their reputation at the time not good (they would break-up only weeks after the Long Beach show).  Additionally, the sound quality was outstanding (certainly by the usual bootleg standards), something not then easy to achieve in outdoor venues with a raucous audience.  Curiously, the original On the Wings of a Russian Foxbat bootleg used for the cover art a picture of unsmiling soldiers from the PLA (People’s Liberation Army) from the Republic of China (then usually called “Red China” or “Communist China); presumably the bootleggers decided the star on the caps was “sufficiently Russian”.  In 1995, re-mastered, the recording (with a few bundled “extras”) was re-issued as an “official” release, the fate of many a bootleg.  With memories of the diplomatic incident in 1976 having faded, although On the Wings of a Russian Foxbat still appeared on the cover, the album was marketed as Live in California, Long Beach Arena, 1976.