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.
Under human influence, species are spreading faster than ever.
Stem cells are revolutionizing disease study and treatment.
A new study shows that primates' precision grip evolved more than once.
Vietnam's threatened, still-mysterious biodiversity gets a conservation connection.
Clues to endurance running and other unique human traits.
The delta's levees are no match for a big earthquake.
A feast before its time.
A predator returns - and reverses decades of aspen decline.
A digital landscape of the American Southwest.
How have humans altered Earth's land surface? See it via satellite.
An "extended family" once lived by Kenya's Lake Turkana.
Athens copes with the aftermath of a devastating fire.
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.
What can ape communication tell us about the origins of human speech?
How do scientists study fossils that remain at the site of discovery?
Tinder-dry southeast Georgia is beset by the worst blazes ever seen in the state.
A Korean estuary is turning to farmland, endangering hundreds of thousands of shorebirds.
People vary in addictive behavior - and in the genes that influence it.
What could happen if global warming melts Greenland completely?
Biologists discover that 1 Asian frog species is really 18.
The web of roads across central Africa leaves wildlife at risk.
Can river sediment reach Australia's vulnerable outer reef?
Curious artifacts tell scientists about modern human migration into Eastern Europe.
Researchers find a new genetic explanation for why some adults can digest milk.
A team of biologists is on a microbial mission around the world's oceans.
Should we conserve regions with higher numbers of species—or regions with more species variety?
An ongoing effort to reduce agricultural pollution in Florida's Everglades is seeing results.
Space Shuttle data will help conserve "invisible" waterways.
How does the bilingual brain control which language to speak?
Raising animals is more damaging than transportation.
Global warming is stressing populations.
By monitoring avian flu, scientists prepare for possible pandemics.
Can an urban waterway reclaim its historical ecological health?
Learn the origins of our Moon.
A revolutionary set of star-seeking telescopes is taking precision to the next level.
Follow a satellite’s-eye-view of the habitats of the Congo River.
Geologists monitor Yellowstone National Park's volcanic system.
Nowhere else are primates as diverse…or as endangered.
Pluto in 2015...or bust.