He’s at it again. A wave of unusual posts from Donald Trump on Truth Social has drawn intense public attention after the president shared a series of AI-generated alien images and futuristic war-themed visuals, all while his administration advances the ...

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, scientists can be misled because certain geological processes can produce chemical signatures identical to those of living organisms.