Episodes

7 episodes in this season

Catastrophes that Changed the Planets

45 min

Nemesis: The Sun's Evil Twin

45 min

How the Solar System was Made

45 min

Crash Landing on Mars

45 min

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Worst Days on Planet Earth

45 min

UFO: The Real Deal

45 min

God and the Universe

45 min

The Universe

TV Series

200745m8.0

Documentary

Now playing

Worst Days on Planet Earth

Season 6 · Episode 5 · Nov 29, 2011

Earth may seem like the most hospitable planet in the solar system. But look again. Startling new discoveries reveal the blue planet has been plagued by more chaos and destruction than scientists once imagined. Stand on the Earth billions of years ago as a primitive planet slams into it. Shiver as our entire globe is frozen over like a gigantic snowball. Feel the heat as mammoth volcanoes scorch the landscape and darken the sky. From a cosmic gamma ray burst frying away the ozone layer to an Everest-size asteroid slamming into the ocean, we'll reveal new information about how these unparalleled events drove life to the brink of total extinction. Out of this continuous devastation, how has our planet--and life--got to where it is today? Are the worst days behind us--or lurking in the distant future?

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The Universe

TV Series

200745m8.0

Documentary

Now playing

Worst Days on Planet Earth

Season 6 · Episode 5 · Nov 29, 2011

More details