Episodes

What processes in the depths of the Earth forge beautiful and precious stones?

Witness the devastation wrought by Hurricanes Harvey, Irma, and Maria in 2017.

Beyond the bizarre, icy worlds of Uranus and Neptune, Pluto dazzles with its mysterious ocean.

The New Horizons spacecraft zooms toward an object 4 billion miles from Earth.

NASA's Cassini reveals the mysteries of Saturn's rings—and new hope for life on one of its moons.

Jupiter's massive gravitational force has made it both a wrecking ball and a protector of Earth.

Before it was a dry planet, Mars was a wet world that may have hosted life.