Jul 4, 2014 — Maybe it was messier than we thought, some scientists now say. Big brains, long legs and long childhoods may have evolved piecemeal in different spots, in response to frequent swings in climate.
Sep 5, 2013 — Tuberculosis is one of the oldest diseases in human history. Signs of the bacteria have even been seen in Egyptian mummies. Now scientists find evidence that TB is much more ancient than we thought. The bacteria may have started infecting people more than 70,000 years ago, long before farming began.
Aug 20, 2013 — By precisely measuring footfalls, scientists discovered that healthy human feet bend and flatten much like the feet of tree-dwelling apes. And the flex in one person's foot can vary a lot from one step to the next.
May 22, 2013 — Our closest relatives, chimpanzees and gorillas, breast-feed their offspring for several years. Some baby orangutans nurse until they are 7 years old. Researchers found a way to test ancient teeth for clues about when humans cut nursing short.