If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
Cold water weighs more than hot water.
93
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
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75