Walking and running upright on two feet as humans do requires some specialized adaptations of the skeleton and muscles. Modern human anatomy has built on the strengths and the weaknesses of a body ...

Lucy, an early human ancestor, could run upright but much slower than modern humans. New simulations show that muscle and ...

As they stepped, their feet fell close together ... that walked upright" makes it a celebrity species in the story of human evolution. Lucy's pelvis hints that she walked upright on two legs.

A total of 11 human fossils were unearthed, including one well-preserved foot metatarsal bone ... "The facial structure and mandible show early evolution toward modern humans, including a flat ...