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

Some believe the Betz mystery sphere, a steel ball that a Florida family found on their property in 1974, is a piece of alien technology. Here’s the truth.

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 ...

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 ...