The smell of freshly cut grass is actually a plant distress call.
31
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
In zero gravity, a candle's flame is round and blue.
16
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118