Negative Sunset
11 May 2012, 22:11 UTC
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Earth has blue skies and red sunsets. Interestingly enough, Mars has red skies and blue sunsets. While at first glance, it might seem curious that the two planets seem to have the opposite skies to each other, it starts to make more sense when you look at what causes the colour of a planet's sky in the first place.(Read more ...)
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