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Has Kepler Discovered an Alien Megastructure?

NASA's Kepler space telescope has detected something weird orbiting a nearby star -- is it evidence of an alien civilization? Or is it just a clump of comets?

October 14, 2015
2:23 PM EDT
The transit data for KIC 8462852, featuring the obvious transit features D800 and D1500. | Boyajian et al.