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.