Most dust particles in your house are made from dead skin!
67
A cubic yard of air weighs about 2 pounds at sea level.
31
Sound at the right vibration can bore holes through a solid object.
134
Pumice is the only rock that floats on water.
14
The average home creates more pollution than does the average car.
33
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18