These are tantalizing hints that microbes might have lived on Mars billions of years ago, but scientists need to study the rocks back on Earth to be sure.
the Jezero crater for 550 Martian days, NASA’s Perseverance rover has amassed nearly half its planned rock collection—including some containing organic molecules, a possible sign that life could have thrived there more than 3 billion years ago. These are compounds that contain carbon, and often hydrogen or oxygen, which are likely crucial to life forming.
“We have discovered rocks that were deposited in a potentially habitable environment in that lake, and we have been seeking potential biosignatures,” which may have been produced by life, said Ken Farley, the Perseverance project scientist at Caltech, speaking today at a press conference at NASA’s Jet Propulsion Laboratory in Pasadena, California. In fact, the Perseverance team picked the crater as the rover’s landing spot for that reason.
NASA has a backup plan, too. In case something happens to Percy over the next few years, the rover will also cache some samples in a safe, flat place where they can be retrieved easily. Because there’s hardly any weather on the planet, and few major
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