Human blood already comes in a bewildering variety of types, but researchers have now identified a new one so rare that only three people on the planet are known to carry it. The finding exposes just ...

When researchers in China announced a possible new human species from a cave in Hebei province, they did more than add another name to our already crowded family tree. They introduced a population ...

One of the most complete human ancestor fossils ever found could be an entirely new species, according to a new study. The fossil, found in South Africa’s Sterkfontein Caves in 1998 and dubbed “the ...