Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Sound travels about 4 times faster in water than in air.
408
The average temperature at 40,000 feet above sea level is -60 F.
56
Most dust particles in your house come from dead skin.
48
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Pumice is the only rock that floats on water.
14
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
The force of a suction cup is calculated using F=AP.
15