Tuberculosis afflicted our ancestors 500,000 years ago.
The team that decoded Neanderthal DNA last November scans it for clues to speech capabilities.
African "megadroughts" likely played a role in where and when early humans traveled.
Two research teams have reprogrammed adult cells into stem cells—without using embryos.
Stem cells are revolutionizing disease study and treatment.
A new study shows that primates' precision grip evolved more than once.
Clues to endurance running and other unique human traits.
A feast before its time.
An "extended family" once lived by Kenya's Lake Turkana.
An innovative new technique to harvest stem cells dispenses with sperm.