NASA may have collected the first evidence of life on Mars.
NASA could have found life on Mars
The space agency's Perseverance Rover has gathered 'alien' deposits from the Red Planet but will have a long wait for proof as the samples are not due back on Earth until 2033.
The Perseverance Rover has drilled down into the rocky outcrop Berea - which is likely to have formed from deposits carried downstream by an ancient river that flowed beyond the Jezero crater that the Rover has been exploring.
NASA scientist Katie Strack Morgan explained that Berea rock is one of the best hopes of finding life on Mars.
She said: "The rock is rich in carbonate. Carbonate rocks on Earth can be good at preserving fossilised life forms.
"If biosignatures were present in this part of Jezero crater, it could be a rock like this one that could very well hold their secrets."