When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The average temperature at 40,000 feet above sea level is -60 F.
56
In zero gravity, a candle's flame is round and blue.
16
Most dust particles in your house are made from dead skin!
67
The storage capacity of human brain exceeds 4 Terrabytes.
140
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
The bark of an older redwood tree is fireproof.
65