A Just So Story by DNA

A few years ago we shared a story similar to the one below, where Kipling’s Just So Stories were linked with reporting on modern evolutionary biology; a year before that, at the beginning of this blog’s start in India, we discussed Kipling’s ties to that country and its wildlife. From the New Yorker‘s Elements section comes the story “How the Giraffe Got Its Neck,” by Anthony Lydgate:

It’s difficult to know what to make of the giraffe. It shuffles like a camel (right legs forward, then left legs) but runs like a rabbit (hind legs forward, then front legs). Its distinctive aroma repulses many ticks but enchants certain people. It bellows, hisses, and moans in the wild, and in captivity it hums in the dark. It naps with its head aloft but sleeps like a swan, with its head on its haunches. Had Aristotle ever seen a giraffe, he might have said that it was the product of an interspecies dalliance at the watering hole, which he thought of as a kind of zoological swingers’ club—a place where “bastard animals are born to heterogeneous pairs.”

Centuries of further guesswork failed to clarify the giraffe’s essential nature. Simone Sigoli, a Renaissance traveller, wrote that it had the body of an ostrich, only with fine white wool instead of feathers, and that it ate bread. “It is quite a deformed thing to see,” he concluded. Sigoli’s contemporary Sir John Mandeville (likely the pseudonym of a travel-averse plagiarist) described the “gerfaunts” of Arabia as deer-rumped horses. For the eunuch general Zheng Hi, who brought a giraffe home to Beijing, in 1415, it was a mythical qílín incarnate. Not until the seventeenth century did the English, who fixated on the giraffe’s camel-ish shape and leopard-ish coloring, stop calling it a camelopard. Today, of course, we recognize the giraffe as a distinct species, though the misapprehensions of the past endure in the animal’s Linnaean name: Giraffa camelopardalis.

And then there’s that neck. Why is it so long? Unlike the swan and the ostrich, which have a surplus of neck bones, the giraffe has seven cervical vertebrae, the standard count for a mammal. But each one is eleven inches in length. A human’s entire spine, by comparison, is about two feet from top to bottom, not much longer than a giraffe’s tongue. (Fynes Moryson, a Scotsman who went to Constantinople in 1597, was distressed to find that the giraffe in the palace menagerie there was able to plant “familiar kisses” on him from great range.) The French naturalist Jean-Baptiste Lamarck held that a giraffe was merely an antelope whose progenitors had strained their necks toward higher and higher branches for food. Charles Darwin gave barely a thought to the neck problem—it didn’t appear in his magnum opus, “On the Origin of Species,” until the sixth edition—but he favored a similar, if more scientifically rigorous, explanation. In periods of drought, he suggested, when all the other animals on the savannah were scrounging at eye level, Giraffa sprouted the evolutionary equivalent of an EZ Reacher, which gave it access to a private larder in the succulent crowns of the acacia trees, a privilege it passed on to its offspring. “It seems to me almost certain that an ordinary hoofed quadruped might be converted into a giraffe,” Darwin wrote, echoing Lamarck. The theory was accepted as gospel for decades, until researchers noticed two problems. First, no other quadrupeds underwent such a conversion: the giraffe remained the lankiest thing around. And second, the animal grazed with its neck horizontal about half the time, feeding on the same bushes and shrubs as everyone else. (As Edgar Williams notes in his book “Giraffe,” the animal is a born topiarist, “giving a manicured appearance to the savannah.”)

Read the rest of the article here.

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