Iron weighs more after it rusts.
68
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
The earth is approx. 6,588,000,000,000,000,000 tons.
175
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
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7