Iron weighs more after it rusts.
16
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Iron weighs more after it rusts.
68
The average temperature at 40,000 feet above sea level is -60 F.
56
The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
One ragweed plant can release as many as one billion grains of pollen!
51
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7