The smell of freshly cut grass is actually a plant distress call.
31
The average home creates more pollution than does the average car.
33
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
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
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Pure water (H2O) does not conduct electricity on its own.
46
If the chemical sodium is dropped into water it will immediately and violently explode.
67
One ragweed plant can release as many as one billion grains of pollen!
51