Some day in the far future, it's possible our descendants will kick it up a notch and wrap the entire Sun in a massive solar-collecting shell known as a Dyson Sphere. It's also possible that some advanced alien civilisations have already gone this route, which is why some SETI folks are on the lookout for these hypothetical objects. But a new study proposes that aliens are more likely to build megastructures around pulsars than stars -- and importantly, we should be able to detect these objects from Earth using current technology.