Pumice is the only rock that floats on water.
14
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
The sun is 330,330 times larger than the earth.
75