Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
For every gallon of sea water, you get more than a quarter pound of salt.
45
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
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
Out of all the senses, smell is most closely linked to memory.
146