A cosmologist suggests we should look for exploration, along with energy signatures, to try and find aliens. Dyson spheres of some kind may be built to harvest energy from dark matter in black holes.

NASA's hunt for alien life may be undermined by its own instruments, according to a group of leading astrobiologists who warn that current tools and mission designs are likely missing subtle, but ...

, May 12 -- Scientists say they have identified a hidden chemical pattern that could help detect life beyond Earth. The new study, published in the journal Nature Astronomy, suggests that scientists ...