Mount Veniaminof, a stealthy volcano in Alaska, erupted silently, leaving scientists puzzled. New research uncovers why some ...

The Hawaii Volcano Observatory says lava fountains were reaching over 330 feet Wednesday and would likely go higher before ...

The stunning cave in Naica, Mexico, is home to some of the largest crystals on Earth, but harsh conditions can kill those who stay too long.

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.