Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
In zero gravity, a candle's flame is round and blue.
16
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Indoor pollution is 10 times more toxic than outdoor pollution.
62
4.5 pounds of sunlight strike the Earth each day.
27
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71