The average home creates more pollution than does the average car.
33
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
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
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Iron weighs more after it rusts.
16
4.5 pounds of sunlight strike the Earth each day.
27
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57