Watch how the first atomic bomb test unfolded, as scientists pushed the limits of physics in a race to end the war. Behind the scenes, there were real fears that the explosion could trigger a chain ...

In 1994, astronomers witnessed one of the most dramatic events ever recorded in space when comet Shoemaker–Levy 9 smashed into Jupiter. Traveling at more than 216,000 km/h, the comet broke into 21 ...

Imagine a 150-kiloton nuclear bomb exploded in the city closest to you. Do you know how the city, its surrounding region, and its inhabitants would be affected? If you can't think of much more than "a ...