The smell of freshly cut grass is actually a plant distress call.
31
The bark of an older redwood tree is fireproof.
65
Iron weighs more after it rusts.
68
Research indicates that plants grow healthier when they are stroked.
173
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
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117