Both the United States and China are working to put their astronauts on the moon in the next few years, with NASA's acting ...

A planetary dispute turns cosmic. When Uranus ventures too close to Earth, tensions rise and the solar system watches.

Two cosmic mysteries—one a devourer of light, the other a theoretical fountain of matter—meet in an unprecedented event. Join ...

If everyone turned on their lights all at once around the world, they would create a huge, sudden demand for electricity. Power plants would have to ramp up generation very quickly to avoid a system ...