Brass doorknobs automatically disinfect themselves in about 8 hours.
18
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
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
Sound travels fifteen times faster through steel than through air.
134
One ragweed plant can release as many as one billion grains of pollen!
51
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65