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Why Eclipses Don't Happen Every Month

Why Eclipses Don't Happen Every Month

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Amazing Discoveries from Cassini

Amazing Discoveries from Cassini

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Cassini's Search For Life

Cassini's Search For Life

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Saying Goodbye to Cassini

Saying Goodbye to Cassini

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2:31
Why Did NASA Kill Cassini?

Why Did NASA Kill Cassini?

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Why Did Houston Flood?

Why Did Houston Flood?

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3:19
Musket v Medieval Armor

Musket v Medieval Armor

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2:58
Why Worry About ICBMs?

Why Worry About ICBMs?

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2:59
Forbidden City Facts

Forbidden City Facts

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1:34
Ancient Volcanic Activity in Ice

Ancient Volcanic Activity in Ice

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Can Math Detect Gerrymandering?

Can Math Detect Gerrymandering?

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3:05
What Makes a Hurricane?

What Makes a Hurricane?

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NOVA

How to Build the Universe

A how-to guide for anyone planning to build a universe.