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
Most dust particles in your house are made from dead skin!
67
One third of the electricity produced on earth is used to power electric light bulbs!
75
Pumice is the only rock that floats on water.
14
Iron weighs more after it rusts.
68
Nylon is made from coal and petroleum.
42
Diamonds can be shattered with a hammer.
-104
One barrel of petroleum holds 42 gallons.
20