4.5 pounds of sunlight strike the Earth each day.
27
Most dust particles in your house come from dead skin.
48
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
One barrel of petroleum holds 42 gallons.
20
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
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
Hot water can freeze faster than cold water.
181