Iron weighs more after it rusts.
16
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
The average temperature at 40,000 feet above sea level is -60 F.
56
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
According to studies, men change their minds two to three times more often than women.
72
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Pure water (H2O) does not conduct electricity on its own.
46