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
For every gallon of sea water, you get more than a quarter pound of salt.
45
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
A cesium atom in an atomic clock beats over nine billion times a second.
43
One cubic foot of gold weighs more than 1,200 pounds!
78
The smell of freshly cut grass is actually a plant distress call.
31
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116