Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Out of all the senses, smell is most closely linked to memory.
146
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Iron weighs more after it rusts.
16