Pumice is the only rock that floats on water.
14
Most dust particles in your house come from dead skin.
48
The smell of freshly cut grass is actually a plant distress call.
31
Each day, up to 150 species of life become extinct.
-23
According to studies, men change their minds two to three times more often than women.
72
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The bark of an older redwood tree is fireproof.
65