Have signs of life been found on another planet? Scientists are calling that into question / The truth about life on other planets - and what it means for humans / Scientists detect possible signs of life on another planet -- but it's not aliens / Is there life on another planet? Scientists find the strongest evidence yet / Life on other planets 'not such a long shot' after historic new scientific discovery / If it moves, it's probably alive: Searching for life on other planets / Bizarre find in Earth's remotest region has huge implications for life on other planets / Does life really need planets? Maybe not / Potential indicators of life on other planets can be created in a lab / Earth is more than a planet with life on it. It's a "living planet"