Skip to main content
Donate

Up Next

Why Did Houston Flood?

Why Did Houston Flood?

Video
3:19
Musket v Medieval Armor

Musket v Medieval Armor

Video
2:58
Why Worry About ICBMs?

Why Worry About ICBMs?

Video
2:59
Forbidden City Facts

Forbidden City Facts

Video
1:34
Ancient Volcanic Activity in Ice

Ancient Volcanic Activity in Ice

Video
1:49
Can Math Detect Gerrymandering?

Can Math Detect Gerrymandering?

Video
3:05
What Makes a Hurricane?

What Makes a Hurricane?

Video
1:20
First Time Britain Left Europe

First Time Britain Left Europe

Video
3:15
New Kind of Astrophysics is Born

New Kind of Astrophysics is Born

Video
2:00
Darwin's Beetles Spar Off

Darwin's Beetles Spar Off

Video
1:55
Why Fiddler Crabs Have Giant Claws

Why Fiddler Crabs Have Giant Claws

Video
3:32
Why Home Runs Are on the Rise

Why Home Runs Are on the Rise

Video
3:15
Back to Show
NOVA

Why Did NASA Kill Cassini?

On September 15, 2017 NASA destroyed Cassini—on purpose. Why kill a multibillion-dollar spacecraft?