Cold water weighs more than hot water.
93
Your brain is 80% water.
525
For every gallon of sea water, you get more than a quarter pound of salt.
45
The average temperature at 40,000 feet above sea level is -60 F.
56
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Most dust particles in your house are made from dead skin!
67
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5