Balsa wood is classified as a hard wood!
41
For every gallon of sea water, you get more than a quarter pound of salt.
45
One barrel of petroleum holds 42 gallons.
20
One cubic foot of gold weighs more than 1,200 pounds!
78
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71