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Science 10 October 1997:
Vol. 278. no. 5336, pp. 220 - 222
DOI: 10.1126/science.278.5336.220
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Research News

ARCHAEOLOGY:
Doubts Over Spectacular Dates

Ann Gibbons

New dating techniques based on measuring a tiny luminescence signal from sediments long hidden from light have yielded some of the most startling--and fiercely disputed--dates in archaeology. Among other things, luminescence dates place humans in Australia more than 100,000 years ago, two to three times earlier than previously thought, and in Siberia 250,000 years ago. Many researchers worry that these techniques are being applied too hastily, without enough checking against other methods.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)