Brass doorknobs automatically disinfect themselves in about 8 hours.
18
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 ragweed plant can release as many as one billion grains of pollen!
51
A ball of glass will bounce higher than a ball made of rubber.
73
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
The smell of freshly cut grass is actually a plant distress call.
31
For every gallon of sea water, you get more than a quarter pound of salt.
45