Huge magnetic bubbles millions of miles wide; strange invisible matter, and a death star tearing through bands of icy comets, flinging them into violent orbits.

An examination of Venus; and what it may indicate about Earth's future.

Discovering how life on Earth came to be; the possibility that life on Earth come from another planet.

A look inside the supermassive black hole in the center of the Milky Way to discover terrifying secrets about parallel universes, wormholes, and space-time.

Scientists attempt to understand how this strange force of magnetism works.

The incredible secrets of the moon are revealed; the moon might be responsible for life on Earth.

For years, scientists suspected that the oceans came from molecules delivered to Earth from distant stars by asteroids, but a new discovery suggests that their true origins may be more exotic.