The average temperature at 40,000 feet above sea level is -60 F.
56
The bark of an older redwood tree is fireproof.
65
Pumice is the only rock that floats on water.
14
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
16
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118