Human technology like cell phones and broadcast towers constantly radiate radio waves into space, and astronomers estimate this tell-tale signature of humanity has swept across 75 nearby star systems, ...

Until someone invents warp drive, the only way we can inspect distant exoplanets is with a powerful telescope. However, even the most capable telescopes can only catch faint glimmers from exoplanets.

Hunting for alien civilizations isn't a matter of just waiting around for them to show up; it's the business of combing ...