The smell of freshly cut grass is actually a plant distress call.
31
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
A cubic yard of air weighs about 2 pounds at sea level.
31
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
One cubic foot of gold weighs more than 1,200 pounds!
78
A 'jiffy' is an actual unit of time for 1/100th of a second!
66