Out of all the senses, smell is most closely linked to memory.
146
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5
Iron weighs more after it rusts.
16
Hot water can freeze faster than cold water.
181
The inventor of the Super Soaker squirt gun was a NASA Scientist who also helped develop the Stealth Bomber and the Galileo mission to Jupiter.
7