Walkin' tall
BBC News
Bristol University researchers have discovered that prehistoric reptiles learned to walk upright much earlier than they thought. New-found footprints suggest that reptiles developed into upright citizens over a faster period than the estimated 20 to 30 million years, likely replacing their prone predecessors soon after the mass extinction 250 million years ago.
So what?Upright walking contributed to the evolutionary success of the dinosaurs. Walking with legs tucked beneath the body like modern mammals enabled the creatures to become massive because their weight was directed through their legs to the ground.