The average temperature at 40,000 feet above sea level is -60 F.
56
The storage capacity of human brain exceeds 4 Terrabytes.
140
Sound at the right vibration can bore holes through a solid object.
134
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The earth is approx. 6,588,000,000,000,000,000 tons.
175