A 'jiffy' is an actual unit of time for 1/100th of a second!
66
Pumice is the only rock that floats on water.
14
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
A ball of glass will bounce higher than a ball made of rubber.
73
Sound travels about 4 times faster in water than in air.
408