Pumice is the only rock that floats on water.
14
Balsa wood is classified as a hard wood!
41
The smell of freshly cut grass is actually a plant distress call.
31
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
Dr.Jonas Salk, the man who came up with the cure for polio, didn’t patent the drug. This made the drug more affordable to the general public, and he lost out an an estimated $7 billion dollars for himself.
41