Brass doorknobs automatically disinfect themselves in about 8 hours.
18
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
According to studies, men change their minds two to three times more often than women.
72
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108