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

Wednesday January 23, 2019. 08:22 PM , from BoingBoing

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!).'

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