Up next in Science
2:49
The science of 'The Martian,' fact-checked
0:41
Demonstrators protest telescope installation in Hawaii
1:12
Watch the sky turn dark in a rare total solar eclipse
1:28
NASA previews Orion spacecraft test
0:49
Historic heat wave triggers massive wildfire in Spain
2:16
Europe is bracing for a record-setting heat wave. Here's what you need to know.
1:26
The summer solstice: A day defined by its brightness
0:55
What is chronic wasting disease?
1:00
NASA announces plans to open ISS for commercial use
5:45
The surprising reasons why drug prices in the U.S. are higher than in the rest of the world
12:25
After 66 million years, a T. rex makes its grand debut
0:47
How an anaconda in an all-female exhibit got pregnant and gave birth