Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Sound travels fifteen times faster through steel than through air.
134
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Nylon is made from coal and petroleum.
42
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
Aluminum used to be more valuable than gold!
84
According to scientists, the color of the cup that we're drinking from can alter our perception of the actual taste of the drink.
12