There are two golf balls sitting on the moon.
Space Shuttle vs Train Engine
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
More Science Facts
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
The temperature of the earth's interior increases by 1 degree every 60 feet down.