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
Your brain is 80% water.
525
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
Sound travels about 4 times faster in water than in air.
408
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
For every gallon of sea water, you get more than a quarter pound of salt.
45
Pumice is the only rock that floats on water.
14