Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Iron weighs more after it rusts.
68
In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
16
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101