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Orrorin tugenensis

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Guide to Sahelanthropus, Orrorin and Ardipithecus

These fossil species between 8 million and 4.4 million years old include some of the earliest members of the hominin lineage.

Ardipithecus hand skeleton next to a human hand X-ray image
Members Public

Have Sahelanthropus and Orrorin been written out of existence?

A big argument about the so-called savanna theory comes with a surprising claim about the earliest possible hominin fossils.

Artistic image of a skull of Sahelanthropus enshrouded by fog and clouds