Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
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
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
The force of a suction cup is calculated using F=AP.
15