Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
Each day, up to 150 species of life become extinct.
-23
Liquid TIDE laundry detergent glows under a blacklight.
96
The average home creates more pollution than does the average car.
33