Two small genetic changes reshaped the human pelvis, setting our early ancestors on the path to upright walking, scientists say.

In this 4.4-million-year-old skeleton, scientists may have found the missing step between climbing and walking.

Early human ancestors may have learned to walk upright on two legs up in the trees rather than on the firm ground of Africa's ancient savannah. A first-of-its-type study led by researchers at the Max ...

The region of Ethiopia called the Middle Awash, some 140 miles northeast of the capital of Addis Ababa, is a hot, harsh and inhospitable place-a rocky desert punctuated by tree-lined rivers, the ...