In zero gravity, a candle's flame is round and blue.
16
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
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
4.5 pounds of sunlight strike the Earth each day.
27
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Cold water weighs more than hot water.
93
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38