March 7th, 2010 
jfrater Top 10 Theoretical Megastructures^Top 10 Theoretical Megastructures^A megastructure would be the most expensive and greatest achievement in mankind. If you are a science fiction fan, you will probably know most of the items on this list, but if you are not, they are fascinating ideas that could, potentially, one day become reality. Be sure to add your own favorites to the comments.^Makiboypunk
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