The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
There are two golf balls sitting on the moon.
721
Only 55% of Americans know that the sun is a star.
986
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Astronauts get taller when they are in space.
224
More than 20 million meteoroids enter Earth's atmosphere every day.
139