According to a study, human bipedalism may have evolved in trees rather than on the ground.
Human bipedalism, or standing upright on two legs, may not have evolved on the ground as previously thought, but rather in trees.
Human bipedalism, or standing upright on two legs, may not have evolved on the ground as previously thought, but rather in trees.
When an asteroid 12 kilometres (7.5 miles) wide struck Mexico’s Yucatan peninsula one spring day 66 million years ago, brought end of the dinosaurs