To Infinity and Beyond, or at Least to Mars – The Wall Street Journal

David W. Browns Mars or Bust (Review, Dec. 19) is spot on: Mars is the next true destination for humans in space exploration. Over the past 20 years NASAs Mars Exploration Program has changed our understanding of the planets extensive rivers and oceans, ability to support past or present life, and ability to support human explorers. Human-scale entry and landing systems are the only real remaining technology hurdle, yet Mars Science Laboratorys Curiosity and Perseverance landing systems have significantly…

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