Why do we always see the same side of the moon?

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Take a look at the moon and you'll always see the same 'face'. But surely the moon rotates on its axis? And what of this so-called 'dark side of the moon'. I had to find an answer for this as it's the sort of thing that bugs my brain as I'm driving home at night. The moon rotates. That is a fact. But it completes one rotation in pretty much the amount of time it takes to circle the Earth. Approximately 27.3 Earth days.  The Earth completes one rotation on its axis every 24 hours. At least, that's how lo...[more]