Walking on two legs has long been considered a milestone in human evolution and one of our most defining characteristics.

WASHINGTON >> Bipedal locomotion — walking upright on two legs — is a fundamental trait underpinning humankind’s success. Scientists have now identified two innovations that occurred long ago in the ...

How one of the oldest candidates for a human ancestor moved through its environment has remained an open question. A seven-million-year-old fossil from central Africa has been interpreted either as an ...