Our handsome and pleasant-smelling managing editor is running behind schedule again, so he has instructed me to post this fine re-run from 02 February 2007. Hopefully it will educate and amuse in spite of its re-runniness.

In the late 1800s, a German high school mathematics instructor named Wilhelm Von Osten was pushing a few scientific envelopes from his home in Berlin. Among other things, he was a student of phrenology, the now discredited theory that one’s intelligence, character, and personality traits can be derived based of the shape of one’s head. But it was his keen interest in animal intelligence that would ultimately win him fame.

Von Osten firmly believed that humanity had greatly underestimated the reasoning skills and intelligence of animals. To test his hypothesis, he took it upon himself to tutor a cat, a horse, and a bear in the ways of mathematics. The cat was indifferent to his efforts, and the bear seemed outright hostile, but the arab stallion named Hans showed some real promise. With further tutelage, Hans the horse learned to use his hoof to tap out numbers written on a blackboard. Much to Von Osten’s delight, jotting a “3″ on the blackboard would prompt a tap-tap-tap from his pupil, a feat which Hans could repeat for any number under ten.

Encouraged by this success, Von Osten pressed his student further. The scientist drew out some basic arithmetic problems on his chalkboard, and attempted to train the horse in the symbols’ meanings. Hans had no problem keeping up with the curriculum, and soon he was providing the correct responses to a variety of math problems including basic square roots and fractions. Hans was proving to be a clever horse indeed.

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On 21 February 2003, a physician in Hong Kong was feeling particularly unwell. He must have had an inkling that something serious was amiss, for his symptoms closely matched those of a number of patients he had treated in recent weeks: fever, aching muscles, headache, a dry cough, and shortness of breath. An alarmingly high proportion of these people had become critically ill, with inflamed, fluid-saturated lungs. Breathing was rendered somewhat difficult, and death frequently followed.

Although the sixty-four year old nephrologist resided in the Guangdong region of southern China, he was enjoying time away for a family wedding when the worst of the symptoms struck. Sketchy reports of a mysterious respiratory illness had been filtering out of his home province for several months, but the official channels gave no indication of anything untoward. The day he arrived in Hong Kong he felt well enough to check into his room on the ninth floor of the Metropole Hotel, and he even did some sightseeing and shopping later in the afternoon. But the following morning his condition had worsened, and he was forced to seek care at the territory’s Kwong Wah Hospital. There he told staff he feared he had contracted “a very virulent disease,” and suggested immediate isolation. Yet the damage had already been done.

Back at the Metropole Hotel, globetrotting guests from the ninth floor were preparing to leave for Canada, Singapore, and Vietnam. Soon, they too would fall ill. In less than a week, the world would be left poised on the brink of a pandemic. Severe Acute Respiratory Syndrome (SARS) had arrived. While the occupants of the western hemisphere often remember the events in the context of an overblown media frenzy, many epidemiologists today regard the outbreak as a near-miss for humanity– one which might have become one of history’s most unpleasant epidemics had it not been for the quick thinking and selflessness of a few individuals.

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Sir Francis Galton, father of eugenicsWhen Charles Darwin published his groundbreaking theory of Natural Selection in 1859, it was received by the public with considerable vexation. Although the esteemed naturalist had been kind enough to explain his theory using mounds of logic and evidence, he lacked the good manners to incorporate the readers’ preconceived notions of the universe. Nevertheless, many men of science were drawn to the elegant hypothesis, and they found it pregnant with intriguing corollaries. One of these was a phenomenon Darwin referred to as artificial selection: the centuries-old process of selectively breeding domestic animals to magnify desirable traits. This, he explained, was the same mechanism as natural selection, merely accelerated by human influence.

In 1865, Darwin’s half-cousin Sir Francis Galton pried the lid from yet another worm-can with the publication of his article entitled “Hereditary Talent and Character.” In this essay, the gentleman-scientist suggested that one could apply the principle of artificial selection to humans just as one could in domestic animals, thereby exaggerating desirable human traits over several generations. This scientific philosophy would come to be known as eugenics, and over the subsequent years its seemingly sensible insights gained approval worldwide. In an effort to curtail the genetic pollution created by “inferior” genes, some governments even enacted laws authorizing the forcible sterilization of the “insane, idiotic, imbecile, feebleminded or epileptic,” as well as individuals with criminal or promiscuous inclinations. Ultimately hundreds of thousands of people were forced or coerced into sterilization worldwide, over 65,000 of them in the country which pioneered the eugenic effort: The United States of America.

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