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
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Most dust particles in your house come from dead skin.
48
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Neanderthal man had a brain capacity 100cc larger than modern man's.
50