Pumice is the only rock that floats on water.
14
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
Most dust particles in your house come from dead skin.
48
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21