4.5 pounds of sunlight strike the Earth each day.
27
Sound travels fifteen times faster through steel than through air.
134
One barrel of petroleum holds 42 gallons.
20
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Most dust particles in your house come from dead skin.
48
Iron weighs more after it rusts.
16