One barrel of petroleum holds 42 gallons.
20
The earth is approx. 6,588,000,000,000,000,000 tons.
175
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Nearly 50% of the world's scientists are assigned to military projects.
71
The sun is 330,330 times larger than the earth.
75
The average temperature at 40,000 feet above sea level is -60 F.
56
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79