Posts Tagged ‘crabs’
“What is the pattern that connects the crab to the lobster and the primrose to the orchid, and all of them to me, and me to you?”*…
Crab-like body plans have evolved independently at least five times. As Jason P. Dihn explains, biologists are still trying to figure out exactly why…
In 1989, paleontologist Stephen Jay Gould proposed a thought experiment: What would the world look like if we turned back time and replayed the evolutionary tape? “I doubt that anything like Homo sapiens would ever evolve again,” he concluded. Maybe not. But crabs might.
Evolution just can’t stop creating crabs. Believe it or not, the flat-and-wide body plan has evolved at least five different times. The process is called carcinization, and it’s inspired comics, memes and entire subreddits.
Still, biologists don’t know why crabs keep evolving. Figuring it out would satisfy the online masses, sure, but it would also be a step toward solving other important scientific mysteries. For instance, why some species share evolutionary paths while others forge unique ones (looking at you, platypus)…
Convergent evolution: “Evolution Only Thinks About One Thing, and It’s Crabs,” from @JasonPDinh in @DiscoverMag.
Will crabs need to (re-)evolve a sixth time? “Alaska’s snow crabs have disappeared. Where they went is a mystery.”
(Image above: source)
* Gregory Bateson
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As we fiddle with phylogeny, we might spare a thought for Walter Rothschild, 2nd Baron Rothschild; he died on this date in 1937. A British banker, politician and soldier, he is best remembered for his pursuit of his passion— zoology and his collection of species. At its largest, Rothschild’s collection included 300,000 bird skins, 200,000 birds’ eggs, 2,250,000 butterflies and 30,000 beetles, as well as thousands of specimens of mammals, reptiles, and fishes. They formed the largest zoological collection ever amassed by a private individual (and are now part of the Natural History Museum). He named dozens of animal taxa, published Novitates Zoologicae, and authored or co-authored scores of scientific papers.
Related: “How Bird Collecting Evolved Into Bird-Watching.”
“The rule of thumb is the more profound the experience, the longer you should wait before doing it again”*…
Beyond their visual qualities, mescaline’s hallucinations posed profound philosophical questions. During the mid-1930s three prominent writers and thinkers left records of their experiments with it. In 1934 and 1935 respectively, Walter Benjamin and Jean-Paul Sartre participated in the now-familiar modus operandi of private session between psychiatrist and artist, with the scientific gaze and the philosopher’s insights informing—or, more often, pitted against—one another…
Sartre wrote little directly about his experience, describing it briefly in notes that later found a place in L’imaginaire, his 1940 study of the phenomenology of the imagination. He found its effects elusive and sinister. “It could only exist by stealth,” he wrote; it distorted every sensation, yet whenever he attempted to perceive it directly it withdrew into the background or shifted shape. Its action on the mind “inconsistent and mysterious,” offering no solid vantage point from which to observe it. In contrast to previous descriptions of the “double consciousness” or état mixte, in which the normal self was able to observe its hallucinations dispassionately, Sartre found it impossible to be a spectator of his own experience. On the contrary, he felt submerged against his will in a miasma of sensations that assailed him viscerally at every turn, a world of grotesque extreme close-ups in which everything disgusted him.
The best-known detail of Sartre’s bad trip is Simone de Beauvoir’s anecdote of him being haunted for weeks after by lobster-like creatures scuttling just beyond his field of vision. Sartre, like Aldous Huxley, was partially sighted—a curious coincidence linking two of the most celebrated intellectuals to have taken the vision-producing drug—and his poor vision may have exacerbated his anxieties about shapes lurking just beyond its reach. Later in life he claimed that it had driven him to a nervous breakdown. “After I took mescaline, I started seeing crabs around me all the time,” he recalled in 1971; “I mean they followed me into the street, into class.” Even though he knew they were imaginary he spoke to them, requesting them to be quiet during his lectures. Eventually he sought psychotherapeutic help from a young Jacques Lacan, which generated “nothing that he or I valued very much,” though “with the crabs, we sort of concluded that it was fear of becoming alone.”…
Caveat comedenti: “Sartre’s bad trip.”
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As we contemplate crustacea, we might spare a thought for Jerome Phillip Horwitz; he died on this date in 2012. A chemist active in cancer research, Horowitz was the first to synthesized AZT (azidothymidine), in 1964, in the hope that it might retard the growth of malignant cells. It failed at that task, and lay dormant for two decades… until Burroughs Wellcome tested– and patented– Horowitz’s development as a treatment for HIV-AIDS. The drug company got FDA approval in 1986, and went on to reap enormous financial returns, of which Horowitz saw none.
After AZT, Horowitz went on to create many successful treatments for cancer and other diseases.
(While some believe that Horwitz was referenced in the Captain Underpants books, the Jerome Horwitz Elementary School in the children’s book series was in fact named after Curly Howard (Jerome Lester Horowitz) of The Three Stooges.
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