The Mars Rovers found undisputed microfossils, proving life once existed on Mars.

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As of now, no undisputed microfossils have been found on Mars by the Mars Rovers. Some studies have suggested the possibility of past microbial life on Mars, but it has not been confirmed. There is currently no undisputed evidence of microfossils on Mars. While the Mars Rovers have found evidence of past habitable environments on the planet, the search for signs of past or present life on Mars continues.

The Mars Rovers Found Undisputed Microfossils, Proving Life Once Existed