Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Research indicates that plants grow healthier when they are stroked.
173
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The average temperature at 40,000 feet above sea level is -60 F.
56
The left ear is more responsive to words of love and emotion whispered into it than the right.
40