Balsa wood is classified as a hard wood!
41
One ragweed plant can release as many as one billion grains of pollen!
51
A ball of glass will bounce higher than a ball made of rubber.
73
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
A cubic yard of air weighs about 2 pounds at sea level.
31
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
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