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
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
German chemists made a replica of a trophy the size of one molecule.
68
Out of all the senses, smell is most closely linked to memory.
146
The earth is approx. 6,588,000,000,000,000,000 tons.
175