In the 1960s, physicist Freeman Dyson proposed that advanced alien civilizations could be building out enormous megastructures around a star to harness much of its energy. These shells, dubbed Dyson spheres, could be giving off distinct technosignatures, astronomers have suggested, allowing us to glimpse them from many light-years away. Yet, despite our best efforts, we have yet to make first contact, let alone with a megastructure siphoning off the energy released by a star. And, as New Scientist reports, there could be a good reason for that. According to Brian Lacki, a scientist involved with the Breakthrough Listen Initiative, which […]