![]() It’s in that context that NASA has begun collecting advice from scientists about how to renovate the agency’s Mars program, an effort that includes welcoming a fresh look at the size and kind of spacecraft that should be sent how often and to which regions. Meanwhile, NASA is outspoken in its desire to send astronauts to Mars, and Elon Musk has vowed to colonize the planet, even if scientists caution that they don’t yet have sufficient knowledge about Mars to guide such endeavors. No proof has been discovered that life of some form once existed on the planet or that it still does, although there is tantalizing evidence for those possibilities. ![]() ★ Click star at right to open Knowledge Guide.ĭespite NASA’s best efforts over the decades, Mars remains largely enigmatic. ★ Click at right to open this story’s Knowledge Guide entries. ![]() Will these scientists get their way? Leonard David looks at the odds. Credit: NASA/JPL-Caltech NASA rethinks its Mars strategy By Leonard David | March 2022Ī chorus of scientists wants NASA to add small robotic spacecraft to its Mars Exploration Program in a shift from today’s near-total focus on multibillion-dollar rover missions and preparations with Europe to return samples of Martian soil and rocks to Earth. This November 2020 selfie of NASA’s Curiosity was created by stitching together dozens of photos taken by the Mars Hand Lens Imager camera on the turret at the end of the rover’s robotic arm.
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