Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Out of all the senses, smell is most closely linked to memory.
146
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Nearly 50% of the world's scientists are assigned to military projects.
71
A ball of glass will bounce higher than a ball made of rubber.
73