Pumice is the only rock that floats on water.
14
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
One ragweed plant can release as many as one billion grains of pollen!
51
One barrel of petroleum holds 42 gallons.
20
The average home creates more pollution than does the average car.
33
Sound travels about 4 times faster in water than in air.
408
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