Sound travels fifteen times faster through steel than through air.
134
The smell of freshly cut grass is actually a plant distress call.
31
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
One third of the electricity produced on earth is used to power electric light bulbs!
75
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
Sound travels about 4 times faster in water than in air.
408
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89