One barrel of petroleum holds 42 gallons.
20
Indoor pollution is 10 times more toxic than outdoor pollution.
62
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
4.5 pounds of sunlight strike the Earth each day.
27
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
The only letter not appearing on the Periodic Table is the letter "J".
180