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Did Earth life actually begin on Mars? Asteroid impacts could let microbes planet-hop, study suggests

Microbes can survive asteroid-impact pressures, a new study shows, supporting the idea that life could travel between planets on space rocks. A remarkably hardy bacterium can survive pressures similar to those generated when asteroid impacts blast debris off Mars, a new study has found, suggesting that microbes could endure interplanetary journeys and potentially seed life on other worlds,... [3038 chars]

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