July 25, 1946, the United States detonated the first underwater nuclear bomb in history. The explosion on a test site of the Bikini Atoll generated a supersonic shock wave, crushing the hulls of ...

Scientists have long thought Earth's core is solid. Now they have some solid evidence. The core is thought to be a two-part construction. The inner core is solid iron, and that's surrounding by a ...

Seismometers are generally used by scientists to study local or distant earthquakes, but they also can be used to monitor an active war zone, as a new study demonstrates. Any natural earthquake shows ...