The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Hot water can freeze faster than cold water.
181
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Pure water (H2O) does not conduct electricity on its own.
46
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Liquid TIDE laundry detergent glows under a blacklight.
96
Out of all the senses, smell is most closely linked to memory.
146