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4:16
Scattered seeds help reveal when ancient humans first left footprints in North America.
3:55
Some people can do complex behaviors like walking and driving while sleeping.
3:40
The farther away a galaxy is, the redder it appears to our telescopes.
1:48
A pilot program in Phoenix, Arizona aims to cool the city by making the ground less hot.
2:15
Knights and firearms clashed on the battlefield for over 200 years.
1:39
Watch this interview with Sir Arthur C. Clarke for The Mind Machine (1978.)
2:30
Most objects with a radius over 200 miles are spherical, but Haumea is an exception.
0:55
As comets cross the invisible boundary known as the ice line, their ice starts turning into gas.
3:27
This is what it would be like to walk on the surface of Venus.
2:35
For millions of years, a tiny moon has made a significant impact on the structure of Saturn’s rings.
