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
One ragweed plant can release as many as one billion grains of pollen!
51
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
For every gallon of sea water, you get more than a quarter pound of salt.
45
A cubic yard of air weighs about 2 pounds at sea level.
31
A 'jiffy' is an actual unit of time for 1/100th of a second!
66