The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
The bark of an older redwood tree is fireproof.
65
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
The force of a suction cup is calculated using F=AP.
15
4.5 pounds of sunlight strike the Earth each day.
27
Neanderthal man had a brain capacity 100cc larger than modern man's.
50