Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
5
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
The sun is 330,330 times larger than the earth.
75
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199