WASHINGTON (Reuters) -Bipedal locomotion - walking upright on two legs - is a fundamental trait underpinning humankind's success. Scientists now have identified two innovations that occurred long ago ...

Discover the fascinating world of bipedal animals, from waddling penguins and hopping kangaroos to upright-standing flamingos ...

The genetic changes that made it possible for humans to walk upright have been uncovered in a study that also shows how slight variations in skeletal proportions are linked to arthritis. Perhaps the ...

Humans’ ability to walk upright on two legs may have evolved in trees, rather than on the ground, according to scientists studying wild chimpanzees in Tanzania. This contradicts the widely accepted ...