One cubic foot of gold weighs more than 1,200 pounds!
78
The smell of freshly cut grass is actually a plant distress call.
31
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Most dust particles in your house come from dead skin.
48
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
