If an alien megastructure indeed encircles a star known as KIC 8462852, it's 1,500 years old and no one may be home anymore. Q: What’s the deal with that star that was giving off weird light signals?

, 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 ...

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 ...