The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
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
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
The average home creates more pollution than does the average car.
33