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.