Instead, we developed the ability to walk and run upright on our two feet, and we pushed the size of our brains to the limit — the limit, that is, of the female pelvis.
Straight lines and flat surfaces run upright or on level pavements.
It could not run upright or venture far from the trees where it likely took shelter at night, says Latimer. "This foot, therefore, provides some of the best evidence that there were different experiments in bipedalism going on during this time in human evolution," says DeSilva.
It could have been a horse, he thought, but the animal seemed to be running upright, on two feet.
For example, the noted nature writer and photographer Boyd Norton recently caught on video a baboon that suddenly began walking and running upright.
For example, bipedalism, walking and running upright on two feet, is evident in many earliest hominins [1], however, human bipedalism is much more energy economical than in other apes, and requires some specialized adaptations of the skeleton and muscles [2].
In a culture so besotted with celebrity, we were bound to run out of upright luminaries to interview.
Taking on Kansas City's above average pass rush (which was an elite pass rush with similar players last year) could force New England to run frequently to keep Brady upright.
He thumps the piano's pine top with a fist, and leaps upright, once, twice, to run his fingers the length of the keys.
Girls tend to run differently than boys — in a less-flexed, more-upright posture — which may put them at greater risk when changing directions and landing from jumps.
