The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Each day, up to 150 species of life become extinct.
-23
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Your brain is 80% water.
525
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
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Iron weighs more after it rusts.
16