Scientists have found what they say is the strongest evidence yet of possible life beyond our solar system after detecting the chemical footprint of gases that on Earth are only produced by living organisms in an alien planet's atmosphere. Using the James Webb Space Telescope, scientists found traces of two gases - dimethyl sulfide and dimethyl disulfide - on a planet named K2-18 b. On Earth, those gases are generated primarily by living organisms including algae, suggesting K2-18 b could be