The germs that live inside us have evolved with us -- and tell a story of early human migrations.
Light reflected off cars, buildings, and roads can derail wildlife.
Can you both learn something new and recall something old at the same moment?
Climate change appears to be causing a coral decline in the Great Barrier Reef.
A fresh look at the human fossils on Flores Island hints at their evolutionary history.
This landmark American tree is poised to return to eastern woodlands.
China is planting an enormous swath of forest to keep dust storms at bay.
Biologists learn why some HIV-positive people stay healthy for decades.
For marine life, climate change means more than warming.
An experiment uncovers a major killer of this popular sport fish in San Francisco Bay.
Stone Age "family values" reached to the afterlife.
Genetic details help sort out the bear family tree.
Genomics are getting personal.
The federal government is protecting a small group of Alaskan beluga whales before it gets any smaller.
Ancient bones found in caves are yielding genetic clues about Ice Age life.
Hot times in Earth's past lend insight to future warming.
Divers in Australian reefs tallied hundreds of species new to science.
Paleontologists are reconstructing the hearing of early humans for clues to speech ability.
With a telescope this big, the future is bright for South African astronomy.
A new study of Bisphenol A finds an association with heart disease and diabetes.
Roads, buildings, and other new development alter aquatic life in local streams.
The genes of Europeans can reveal their local roots.
A new survey doubles the existing number of western lowland gorillas.
Scientists have generated the first stem cell line that carries a specific disease.
UNESCO has added eight new sites to its list of irreplaceable natural habitats.
Some reptiles and amphibians that live on Madagascar’s highest peaks could face extinction.
Forty-year-old lunar samples contain trace amounts of water.
Neuroscientists have produced the first detailed "wiring diagram" of the human cerebral cortex.
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.