At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
The sun is 330,330 times larger than the earth.
75
Nearly 50% of the world's scientists are assigned to military projects.
71