Sound travels fifteen times faster through steel than through air.
134
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
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
Liquid TIDE laundry detergent glows under a blacklight.
96
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61