Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The bark of an older redwood tree is fireproof.
65
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Nylon is made from coal and petroleum.
42
Scientists aren't sure what color dinosaurs were.
312
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
One ragweed plant can release as many as one billion grains of pollen!
51