Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Out of all the senses, smell is most closely linked to memory.
146
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
For every gallon of sea water, you get more than a quarter pound of salt.
45
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
At 15 years old, Jack Andraka invented a method of diagnosing pancreatic cancer, thus helping to save the lives of millions of people around the world. It is 168 times faster, 26,000 times cheaper, 400 times more sensitive, and has a 99% success rate.
15
In zero gravity, a candle's flame is round and blue.
16