Hot water can freeze faster than cold water.
181
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
For every gallon of sea water, you get more than a quarter pound of salt.
45
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
In zero gravity, a candle's flame is round and blue.
16
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
The force of a suction cup is calculated using F=AP.
15