Sound at the right vibration can bore holes through a solid object.
134
A cubic yard of air weighs about 2 pounds at sea level.
31
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
Iron weighs more after it rusts.
68
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
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