Are you fast? Can you beat a friend in a race? How about an olympic sprinter? How about a beam of light? Find out how fast light is, how far a light year is, and learn how close our nearest exoplanet ...

See a mind-blowing visual that shows just how fast light really travels through space. Trump’s new reflecting pool liner cut with a razor, official reports Coffee linked to significant new side effect ...

Understanding how light years work Meteorologist Hunter Forst explains just how fast light zips through space and how the light year measurement of distance works.