Homo Erectus Engraving, Long-Lost Relatives

A researcher with a digital camera noticed faint marks on a half-million-old shell. It's the earliest known abstract mark: made by Homo erectus.

Scientists discovered genetic traces of a previously-unknown group of people, Denisovans, in a Neanderthal's DNA a year ago.

Detailed analysis of the Neanderthal DNA reveals details of that Neanderthal family's history: and a few genes from another previously-unknown group....

...The woman we know as KNM ER 3733 lived about 1,700,000 years ago....

...The human family has changed a bit since her time: most of us have shorter arms and legs now; our foreheads are smoother and more nearly vertical; and we're probably better at singing opera. I'll get back to that....

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