Iron weighs more after it rusts.
68
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
The earth is approx. 6,588,000,000,000,000,000 tons.
175
In zero gravity, a candle's flame is round and blue.
16
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Hot water can freeze faster than cold water.
181
According to studies, men change their minds two to three times more often than women.
72