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But Warren Sharp, a uranium dating expert at the University of California, Berkeley, points out that the Apidima 1 samples actually returned dates ranging from more than 300,000 years old to less than 40,000 years old.

The finding startled Harvati herself—especially because the uranium dating of Apidima 1 put its age at 210,000 years old.

Uranium dating shows that the image was created at least 40,000 years ago.

Zilhão returned to the cave to try uranium dating.

Dr. Zilhão returned to the cave in order to try uranium dating.