This video shows how long it takes for light to travel from Earth to Mars and back again

At this scale, light moves at a snail's pace.

From the YouTube description: "This is the distance between Earth, the Moon and Mars with the correct distances but with Earth, Moon and Mars 20 times bigger (so you can see them!)." Read the rest

How To: Break the speed of light in your own backyard

Minute Physics serves up another nifty video.

Via Jennifer Ouellette

Video Link Read the rest