In the long history of science, there are few eureka moments. Sudden revelations are rare and science often progresses with Darwinian slowness. Even if they begin with a strikingly unusual hypothesis, most scientists set out to amass more and more data, as Darwin himself did, until they are confident their theories will stand the scrutiny of their peers.
. . .
Such is the case of an international team of archaeologists who found a piece of a stone axe in northern Australia and discovered its blade had been ground down thousands of years earlier than any similar object previously located.
They’re putting it at 35.5kbp. I wonder how certain they are that it is human-made?