Alien civilizations could use Dyson spheres to draw energy from distant stars, and the missing starlight might give them away.
Source: Aliens May Be Rearranging Stars to Fight Dark Energy, Awesome Study Suggests
Alien civilizations could use Dyson spheres to draw energy from distant stars, and the missing starlight might give them away.
Source: Aliens May Be Rearranging Stars to Fight Dark Energy, Awesome Study Suggests
