Meteors have left deep scars all over the face of Earth and are responsible for one of the biggest extinctions in history. Scientists believe that it's not a question of if they'll strike again, but when. This exploration of meteor clashes with Earth includes how scientists are preparing for the next deadly assault on this planet.
Earth's solar system is a cosmic pinball machine, with rock piles as big as cities plowing into planets and leaving destruction in their wake. This exploration of the cosmic neighborhood examines how collisions created Earth's moon, where gashes on Jupiter came from and how pieces of Mars ended up in Earth's backyards.
Scientists examine the cosmic battles being waged between celestial bodies as galaxies smash into each other, stars collide with the force of several nuclear bombs, and black holes fuse in a deadly fireworks display. Even Earth's own galaxy marches toward a clash with its closest neighbor, Andromeda.