Out of all the senses, smell is most closely linked to memory.
146
Most dust particles in your house come from dead skin.
48
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
One cubic foot of gold weighs more than 1,200 pounds!
78
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
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
Sound travels about 4 times faster in water than in air.
408