Nickname: Millenium Man
Where Lived: Eastern Africa (Tugen Hills, central Kenya)
When Lived: Sometime between 6.2 and 5.8 million years ago
Living around 6 million years ago, Orrorin tugenensis is the one of the oldest early humans on our family tree. Individuals of this species were approximately the size of a chimpanzee and had small teeth with thick enamel, similar to a modern human’s. The most important fossil of this species is an upper femur, showing evidence of bone buildup typical of a biped - so Orrorin tugenensis individuals climbed trees but also probably walked upright with two legs on the ground.
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