Brass doorknobs automatically disinfect themselves in about 8 hours.
18
There is a surgical implant being developed that will give you an orgasm at the touch of a button.
20
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
The bark of an older redwood tree is fireproof.
65
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Sound travels about 4 times faster in water than in air.
408