The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Sound doesn't travel in space.
255
The heart of an astronaut actually gets smaller when in outer space.
216
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
The earth travels through space at 660,000 miles per hour.
189
The light hitting the earth right now is 30 thousand years old.
163
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10