One barrel of petroleum holds 42 gallons.
20
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11