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

When sonar first picked up a massive, stair‑like object on the floor of the Baltic Sea, the image looked less like geology and more like a movie prop. The structure’s circular outline, sharp edges and ...

A team of astronomers combed through a collection of odd stars that are candidates for Dyson spheres — artificial constructs designed by aliens to leech energy from stars. Instead, the scientists ...

Add Yahoo as a preferred source to see more of our stories on Google. A NASA satellite image of the sky, with a hot, dusty galaxy circled in magenta. A team of astronomers combed through a collection ...