When—and where—did human imagination first emerge?
Facial expressions may do more than show feelings. They may have evolved as survival instincts.
When forests vanish, seed-spreading animals can come to the rescue.
When one link in Yosemite’s food web falters, the effects cascade.
How does our brain change when we spontaneously create music?
Clearing of Myanmar's lush mangrove forests worsened the damage from Cyclone Nargis.
A new biological rhythm reflects an organism's pace of life.
Urban and rural dwellers express genes differently.
Conservationists reintroduce a native species to its home.
A new study highlights a feedback loop between global warming and a forest insect.
Tracing asthma in Hutterite families has implications for all.
Climate change could bring grave water shortages to the American Southwest.
Scientists have reanalyzed a 6-million-year-old leg bone.
See how human activity is changing fire patterns around the world.
A new hypothesis of mountain growth challenges plate tectonics.
Satellites show severe deforestation in a rare monarch butterfly overwintering site.
New studies maintain that the tiny hominid is a distinct species.
What happens when rivers are allowed to flow on their own?
The most complete malaria risk map in 40 years will help focus treatment.
Most coral reefs are badly degraded, but Kingman Reef is the picture of health.
The innermost planet like we’ve never seen it before.
The life-threatening pathogen MRSA is evolving in ways that may affect its virulence.
A new study finds that mangrove forests and shrimp farms can coexist--to some extent.
A new study shows that pollutants can take a century or more to show up in rivers and streams.
A new population study considers human longevity.
Tuberculosis afflicted our ancestors 500,000 years ago.
Biologists have announced many Antarctic discoveries during International Polar Year.
Oil spills foul shores in San Francisco Bay and the Black Sea.
The team that decoded Neanderthal DNA last November scans it for clues to speech capabilities.
Houses in fire-adapted habitats burned during some of the worst blazes in California history.
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.