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When did humans first appear? 3.3 million years ago.

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When did humans first appear? 3.3 million years ago.

New research indicates that humans first developed into a distinct species about 3.3 million years ago. The scientist used a custom-designed algorithm to work this out by analysing all the data that they had accrued or had been accrued by scientists, as I understand it. The research is published in the journal Nature and Ecology and Evolution. Please click on the Link above the picture to read more.