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Death of American Ground Sloths
Austin Long and Paul S. Martin
New Series, Vol. 186, No. 4164 (Nov. 15, 1974), pp. 638-640
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/1739193
Page Count: 3
You can always find the topics here!Topics: Feces, Caves, Sloths, Ground sloths, Antibodies, Antigens, Rats, Immune tolerance, Sin of sloth, Receptors
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Organic remains, especially dung, of extinct ground sloths provide ideal material for radiocarbon dating. Rampart Cave, Arizona, revealed periodic occupation at intervals by the Shasta ground sloth from before 40,000 years ago until 11,000 years ago. Dates from other caves in the arid Southwest indicate that the Shasta ground sloth disappeared at or very soon after the time of Clovis big game hunters. Ground sloth remains in South America are slightly younger. The timing of ground sloth extinction is in accord with the model of explosive overkill.
Science © 1974 American Association for the Advancement of Science