An innovative new technique to harvest stem cells dispenses with sperm.
Impacts from the IPCC's 2007 report.
A recent genomic study reveals how humans first settled the Americas.
Did surviving an ancient primate virus leave humans open to HIV?
The southeastern U.S. burned repeatedly in this season's extreme drought.
A fossil found in 1952 finally gets dated--and reveals much about early human migration.
How scientists are solving the mystery of the Universe's most powerful explosions.
Can a nation return its captive elephants to the forest?
The muddy trails of bottom trawlers are visible from space.
The DNA of 14,000 people reveals genetic markers for seven common diseases.