Assuming intelligent aliens know how to harvest energy from stars, would humanity be able to spot these high-level structures?

In Amiri’s calculations, Dyson spheres around white dwarfs tend to produce cooler, fainter thermal emission that peaks in the near- to mid-infrared, while M-dwarf cases can radiate more strongly but ...

Some still question the origins of the strange steel ball a Florida family found on their property in 1974. Could it be alien technology? The military—and even ufologists—examined the sphere and said ...