NASA's Curiosity rover has discovered previously unknown organic molecules, ammonia and benzoic acid, on Mars that could be possible indicators of ancient life.
The findings stem from a new technique used by the American space agency in 2017 when the rover's drill stopped working, but the team re-routed Curiosity to place dirt samples into cups pre-filled with a chemical mixture instead of the typical empty containers.
The dirt showed traces of benzoic acid and ammonia, both of which occur naturally in plants and animals, including humans.
To read more, click here.