Iron weighs more after it rusts.
68
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
4.5 pounds of sunlight strike the Earth each day.
27
The earth is approx. 6,588,000,000,000,000,000 tons.
175
The average home creates more pollution than does the average car.
33
One barrel of petroleum holds 42 gallons.
20
Pumice is the only rock that floats on water.
14