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
A ball of glass will bounce higher than a ball made of rubber.
73
4.5 pounds of sunlight strike the Earth each day.
27
For every gallon of sea water, you get more than a quarter pound of salt.
45
Balsa wood is classified as a hard wood!
41
The only letter not appearing on the Periodic Table is the letter "J".
180