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Experts have yet to find to extraterrestrial life, but one researcher from the University of Oxford suggests looking for hypothetical star-sized structures known as Dyson spheres if we want to find aliens.

'What Freeman Dyson did in his Dyson sphere paper is of course point out that, actually, we might want to look for industrial activities that are not intended to communicate,' Anders Sandberg said in an interview with Vice.  

'It's just that [aliens] create structures that we would not normally see in nature and that would be very visible because they're so extreme. And that was a crazy idea back in the sixties and seventies. People were not really ready for it.'  

 

Any advanced civilization would need significant amounts of energy, if humans are any guide, which is where the Dyson sphere star-sized supercomputer would come in. 

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