If the chemical sodium is dropped into water it will immediately and violently explode.
67
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
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Balsa wood is classified as a hard wood!
41
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Aluminum used to be more valuable than gold!
84
Brass doorknobs automatically disinfect themselves in about 8 hours.
18