Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
The smell of freshly cut grass is actually a plant distress call.
31
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57