Add Yahoo as a preferred source to see more of our stories on Google. A new study suggests alien life could be going undetected because scientists focus more on avoiding false discoveries than missing ...

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 ...

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for first contact with extraterrestrial life. Tardigrades—a type of invertebrate ...

When it comes to the search for life elsewhere in the universe, methane and other chemical compounds are seen as signs of biology because they are often produced by living microbes. However, ...

The Pentagon has released another batch of ‘UFO Files’ with footage of unknown objects in the sky—here are the most common alien theories, explained. This voice experience is generated by AI. Learn ...

For generations, the search for life beyond Earth has focused on avoiding one of science’s biggest mistakes: claiming a discovery that turns out not to be real. Researchers have built entire ...