The bark of an older redwood tree is fireproof.
65
German chemists made a replica of a trophy the size of one molecule.
68
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
For every gallon of sea water, you get more than a quarter pound of salt.
45
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
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