The average temperature at 40,000 feet above sea level is -60 F.
56
The bark of an older redwood tree is fireproof.
65
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Scientists are now able to grow 'beating' heart tissue in a lab!
162
The force of a suction cup is calculated using F=AP.
15
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116