Iron weighs more after it rusts.
16
In zero gravity, a candle's flame is round and blue.
16
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Diamonds can be shattered with a hammer.
-104
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71