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Encyclopedia of Evolution.pdf - Online Reading Center

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Dart, Raymond (1893–1988) South African Anatomist,<br />

Anthropologist Raymond Dart made some <strong>of</strong> the most<br />

famous early discoveries <strong>of</strong> fossils <strong>of</strong> extinct human ancestors.<br />

Born on February 4, 1893, Dart grew up in<br />

Queensland, Australia, where his family raised cattle. His<br />

excellent studies at the University <strong>of</strong> Queensland in Brisbane<br />

allowed him to begin medical studies in Sydney. He<br />

went to England to join a medical corps in World War I.<br />

When the war ended, one <strong>of</strong> the world’s leading neuroanatomists,<br />

Grafton Elliot Smith, accepted Dart into graduate<br />

study at the University <strong>of</strong> Manchester. In 1922 Dart joined<br />

the faculty <strong>of</strong> the University <strong>of</strong> Witwatersrand in Johannesburg,<br />

South Africa, as a pr<strong>of</strong>essor <strong>of</strong> anatomy. Dart<br />

displayed brilliance but also challenged many orthodox<br />

opinions <strong>of</strong> his peers. He worked hard to build up the university<br />

facilities for the study <strong>of</strong> anatomy.<br />

Dart’s interest in anatomy extended to fossils. In 1924,<br />

a fossil baboon skull was found at a limestone quarry at<br />

Taung. Dart examined a specimen from this quarry, and<br />

spent a month removing the minerals from the specimen. It<br />

turned out to be the fossil face and jaw <strong>of</strong> a young primate,<br />

now known as the Taung Child (see australopithecines).<br />

Dart immediately recognized that the fossil may represent<br />

an animal intermediate between apes and humans.<br />

He quickly wrote a paper for Nature which described this<br />

species and named it Australopithecus africanus (“Southern<br />

ape from Africa”). Scientists in Britain did not believe<br />

that this species was anything other than an ape. This<br />

was partly because the leading anthropologists <strong>of</strong> the day<br />

(including Grafton Elliot Smith) considered the English<br />

Piltdown man to be the ancestor <strong>of</strong> humans and therefore<br />

concluded that humans evolved in Europe, not Africa. In<br />

fact, the Taung specimen, having an apelike skull and teeth<br />

that resembled those <strong>of</strong> modern humans, seemed difficult to<br />

reconcile with the human skull and apelike jaw <strong>of</strong> Piltdown<br />

man. Almost the only scholar who supported Dart was the<br />

Scottish doctor and paleontologist Robert Broom. When<br />

D<br />

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Dart finally traveled to London in 1930 to try to convince<br />

anthropologists <strong>of</strong> the legitimacy <strong>of</strong> the Taung skull, he was<br />

overshadowed by the recent discovery <strong>of</strong> Peking man (see<br />

Homo erectus). Giving up the fossil hunting for many<br />

years, Dart concentrated on teaching and administration at<br />

the university.<br />

Broom discovered many more australopithecine fossils<br />

in South Africa. As more fossils accumulated, many scientists<br />

finally accepted australopithecines as possible human ancestors.<br />

Encouraged, Dart resumed fossil hunting. At Makapansgat,<br />

Dart found fossils which he named Australopithecus<br />

prometheus, in the erroneous belief that their blackened state<br />

indicated the use <strong>of</strong> fire (Prometheus was the Greek mythological<br />

figure who gave humans fire). These specimens are<br />

now considered to be A. africanus.<br />

Dart is perhaps most famous for his “killer ape” theory.<br />

He claimed that, even though they did not make stone tools<br />

or weapons, the australopithecines used bones, teeth, and<br />

horn as weapons and were bloodthirsty killers. If modern<br />

humans are their descendants, then Homo sapiens must have<br />

inherited these violent tendencies. This idea was popularized<br />

by writers such as Robert Ardrey in his 1961 book African<br />

Genesis. The Dart theory is the inspiration behind the opening<br />

scene <strong>of</strong> the 1968 movie version <strong>of</strong> Arthur C. Clarke’s<br />

2001: A Space Odyssey. Subsequent fossil discoveries, notably<br />

by anthropologist C. K. Brain, showed that the australopithecines<br />

were not the hunters but the prey, and that the<br />

killer ape theory was wrong.<br />

Even though he erred about the killer apes, Dart made a<br />

vital contribution to the study <strong>of</strong> human evolution: He demonstrated<br />

that Darwin had been right in speculating that Africa<br />

was the place where humans evolved (see Darwin, Charles;<br />

Descent <strong>of</strong> man [book]). The genus that Dart named is<br />

still considered almost certainly to be the ancestor <strong>of</strong> modern<br />

humankind, even though the species that Dart discovered<br />

was most likely a side-branch <strong>of</strong> human evolution. Dart died<br />

November 22, 1988.

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