Forty years ago, the Challenger space shuttle disintegrated just after lift-off. A small team of engineers tried to prevent ...
Mars has always felt like a distant neighbor, reachable only after a long, risky cruise through deep space. Now engineers inside NASA are sketching a very different future, one where a nuclear powered ...
NASA's space shuttle Challenger completed 10 missions before it broke apart during a launch in 1986, killing seven astronauts ...
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