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Episode Clips

Why Did These Vikings' Bones Appear Older Than They Are?

Hint: Carbon in the ocean is different than carbon on land.

Who Was This High-Status Viking Warrior?

DNA evidence reveals surprising truth about the identity of a revered 9th-century Viking.

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Back to the Moon

Discover why scientists and entrepreneurs alike have their sights set on the Moon again.

The Planets: Mars

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

The Planets: Inner Worlds

The rocky planets have similar origins, but only 1 supports life. Was it always this way?

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