Long thought irreplaceable, human heart cells actually can regrow.
Harvesting caviar from sturgeon in the Caspian Sea comes at a great cost—the fish's survival.
A genetic study shows the surprising influence of the pineal gland on our 24-hour body cycles.
As bats die across the eastern United States, biologists have more questions than answers.
Scientists create stem cells that are safer to use in research.
A new date for an old fossil hints that Homo erectus was resilient in colder climates.
Biologists have learned that childhood abuse can leave a lasting mark on brain function.
Brain scans are showing how humans handle language.
The wildfires that recur in southern Australia are predicted to worsen as the globe warms.
Gene copying mistakes may have prodded the evolution of gorillas, chimps, and humans.
The remains of the world's largest snake tell a story of the ancient tropics.
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.