Astronomers say they've found "the most promising signs yet" of chemicals on a planet beyond our Solar System that could indicate the presence of life on its surface. Using the James Webb Space Telescope, the team found a possible 'biosignature' – the potential fingerprint of life – within its atmosphere, although they say they're remaining "cautious", and that this isn't a confirmed detection. The chemicals detected are the same as those produced by marine-dwelling organisms on Earth. Credit: P...