A single speck of dust is half way in size between a subatomic particle and the Earth.
15
4.5 pounds of sunlight strike the Earth each day.
27
Scientists aren't sure what color dinosaurs were.
312
According to studies, men change their minds two to three times more often than women.
72
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
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
Scientists are now able to grow 'beating' heart tissue in a lab!
162
If the chemical sodium is dropped into water it will immediately and violently explode.
67