Mars had an oxygen-rich atmosphere around 4 billion years ago
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If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
18
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
11
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
Astronauts get taller when they are in space.
224
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7