The smell of freshly cut grass is actually a plant distress call.
31
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
The only letter not appearing on the Periodic Table is the letter "J".
180
Neanderthal man had a brain capacity 100cc larger than modern man's.
50