For every gallon of sea water, you get more than a quarter pound of salt.
45
Sound travels about 4 times faster in water than in air.
408
Balsa wood is classified as a hard wood!
41
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
One barrel of petroleum holds 42 gallons.
20