This video examines the fate of Ukrainian nuclear weapons following the collapse of the Soviet Union and the reasons behind ...

Welcome to the universe of parallel playgrounds—where seesaws hover in anti-gravity capsules, and jungle gyms coil like strands of DNA on planets unexplored.

Researchers flew a helicopter over Hawaii's Kilauea volcano, capturing dramatic footage of its latest eruptive episode. Close ...

The latest eruption lasted about eight hours this Wednesday. Lava fountains shot from the northern vent with force. Some ...

One of the world’s most famous volcanoes has erupted violently, producing a rare phenomenon and prompting aviation ...