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
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Hot water can freeze faster than cold water.
181
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
The inventor of the Super Soaker squirt gun was a NASA Scientist who also helped develop the Stealth Bomber and the Galileo mission to Jupiter.
7
Out of all the senses, smell is most closely linked to memory.
146