Out of all the senses, smell is most closely linked to memory.
146
Aluminum used to be more valuable than gold!
84
Indoor pollution is 10 times more toxic than outdoor pollution.
62
The average temperature at 40,000 feet above sea level is -60 F.
56
Sound travels fifteen times faster through steel than through air.
134
Pure water (H2O) does not conduct electricity on its own.
46
Nylon is made from coal and petroleum.
42
German chemists made a replica of a trophy the size of one molecule.
68