A cubic yard of air weighs about 2 pounds at sea level.
31
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Dr.Jonas Salk, the man who came up with the cure for polio, didn’t patent the drug. This made the drug more affordable to the general public, and he lost out an an estimated $7 billion dollars for himself.
41
Iron weighs more after it rusts.
16
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
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Most dust particles in your house come from dead skin.
48