Cold water weighs more than hot water.
93
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
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17