When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
German chemists made a replica of a trophy the size of one molecule.
68
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
4.5 pounds of sunlight strike the Earth each day.
27