The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
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
According to studies, men change their minds two to three times more often than women.
72
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Hot water can freeze faster than cold water.
181