A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Sound travels fifteen times faster through steel than through air.
134
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Scientists aren't sure what color dinosaurs were.
312
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
There is a surgical implant being developed that will give you an orgasm at the touch of a button.
20