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Perseverance Rover has found traces of alien signs on the surface of Mars


Mars, Pictures from Perseverance Rover.


The hunt for red planet residents began close to four decades ago, when the agency sent two spacecraft — the Viking landers — to Mars. Their task was to prove that the planet, while red, is not dead.


The landers initially sent back data that seemed consistent with bacteria-like organisms in the soil. But with further analysis, early optimism soured. Was there life on Mars?


NASA concluded: Probably not.


This wishy-washy answer was frustratingly ambiguous, especially for a $1 billion experiment. So, NASA is now taking a different approach in its hunt for microbes. Unlike the Viking landers, the new Perseverance rover isn’t looking for chemical signs of metabolism. Instead, Perseverance will trundle around Mars’ gaunt landscapes searching for sediments. These could contain clues to organisms that pitched and swirled in long-vanished seas.

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