A cubic yard of air weighs about 2 pounds at sea level.
31
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
A cesium atom in an atomic clock beats over nine billion times a second.
43
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
The average temperature at 40,000 feet above sea level is -60 F.
56