Scientists have identified seven stars that show signs of potentially harboring advanced alien technology, known as Dyson spheres. These colossal structures are theorized to be gigantic spheres or swarms of mirrors built by technologically advanced civilizations to harness energy from their host stars. The researchers analyzed data from millions of stars, using a computer program to detect spikes in infrared radiation, a key indicator of Dyson spheres. All seven candidate stars are M-dwarf stars located within 1,000 light-years of Earth.