Turtle Origins

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Science  12 Feb 1999:
Vol. 283, Issue 5404, pp. 945-946
DOI: 10.1126/science.283.5404.945

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Turtles have reigned for years as the most primitive egg-laying animals. Now new evidence is suggesting that their proper place is in the crown of the evolutionary tree, between snakes and dinosaurs. But, as discussed by Rieppel in his Perspective, exactly where in the tree-top they reside is not yet secure, and the data point to several different positions.