At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
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
According to studies, men change their minds two to three times more often than women.
72
Scientists aren't sure what color dinosaurs were.
312
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Most dust particles in your house come from dead skin.
48
The average temperature at 40,000 feet above sea level is -60 F.
56