Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Balsa wood is classified as a hard wood!
41
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
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
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39