Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Liquid TIDE laundry detergent glows under a blacklight.
96
Sound travels fifteen times faster through steel than through air.
134
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
The average temperature at 40,000 feet above sea level is -60 F.
56
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Out of all the senses, smell is most closely linked to memory.
146