As they stepped, their feet fell close together. Like humans today, they maintained good balance because their center of gravity moved forward in a straight line. By contrast, when a chimpanzee ...

Modern human anatomy has built on the strengths and ... bodies toppling to one side when all our weight is on one foot in mid-stride. Chimps have thigh bones that do not slope inward to the ...

In human DNA, however, the enhancer was deleted. That single genetic change could help explain important differences between a chimpanzee foot and our own—and how our ancestors gained the power ...