Advanced alien civilizations may communicate via a series of flashing lights, similar to how fireflies do, a new paper hints. This would potentially make extraterrestrials much harder to spot if we ...

While it sounds like the plot of an Andy Weir novel. If an advanced civilization wanted to tap nearly all the power of its star, it could gather energy by putting a giant collection of light-catching ...

Evidence of alien life or cosmic pyramid scheme? A documentary filmmaker sparked a discussion of advanced Martian civilizations after sharing footage that appeared to depict a “three-sided pyramid” on ...