"The ratio of uranium and thorium in a sheet of calcite suggests that it formed at least 71,000 years ago – so the outline of the hand beneath it must have been left behind sometime before that, ...
The world’s oldest surviving rock art is a faded outline of a hand on an Indonesian cave wall, left 67,800 years ago. On a tiny island just off the coast of Sulawesi (a much larger island in Indonesia ...
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