Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
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
One ragweed plant can release as many as one billion grains of pollen!
51
Out of all the senses, smell is most closely linked to memory.
146
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9