When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
One cubic foot of gold weighs more than 1,200 pounds!
78
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
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39