Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Indoor pollution is 10 times more toxic than outdoor pollution.
62
The storage capacity of human brain exceeds 4 Terrabytes.
140
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Out of all the senses, smell is most closely linked to memory.
146
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