Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
For every gallon of sea water, you get more than a quarter pound of salt.
45
No matter how cold it gets, gasoline will not freeze.
107
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
One barrel of petroleum holds 42 gallons.
20