Letters From Our Readers, March 8, 2021
SALTY OCEANS, NOT DEAD PLANETS NASA’s landing of Perseverance on Mars, as reported in “NASA Rover Picks Up Search for Life on Mars” (Feb. 22-March 7, p. 21), is a great technical achievement. However, I understand that for years, eight or more rovers have landed on the planet looking for any sign of...
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