An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
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 density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
The light hitting the earth right now is 30 thousand years old.
163
There are more nerve cells in the human brain than there are stars in the Milky Way.
349
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277