Abstract
In her article oldest human DNA reveals Aussie oddity (News of the Week, 12 Jan., p. 230), Constance Holden overlooks several problems with the challenge to the Out of Africa theory of modern human origins posed by putative ancient Australian human mitochondrial DNA (mtDNA) sequences (1). Ancient DNA discoveries are easily contaminated (2) and carry a considerable burden of proof, especially when they involve human sequences or surprising examples of preservation. Both concerns apply in the case of the ancient Australian remains (up to 60,000 years old) analyzed by Adcock and colleagues (1), because DNA is not expected to survive for this length of time outside of cold environments (3) and similar remains elsewhere have not yielded genetic material (4).
Original language | English |
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Pages (from-to) | 1655-1656 |
Number of pages | 2 |
Journal | Science |
Volume | 292 |
Issue number | 5522 |
DOIs | |
Publication status | Published - 1 Jun 2001 |
Externally published | Yes |