Beyond oil-coated pelicans, the spill imperils many lesser-known species.
What's the recipe for living a very long life?
Visit Alaska's boreal forest to learn its role in Earth's climate.
The Swift satellite, NASA's high-energy detector, is studying black hole mysteries.
Tiny transmitters reveal that bees pollinate flowers far and wide.
Why can't some teens resist taking risks?
In a nebula packed with stars, not all stay with the crowd.
New maps of global forests show where they are disappearing.
Mood disorders are linked to disturbances of circadian rhythms.
DNA analysis reveals a new—and deadly—strain of flu.