The heart of an astronaut actually gets smaller when in outer space.
215
A 100-pound person on Earth would weigh 38 pounds on Mars.
100
If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
13
Venus is the only planet that rotates clockwise.
310
The sun puts out more power in 1 second than mankind has ever used within human existence.
12
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
148
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
83