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The original was posted on /r/todayilearned by /u/jacknunn on 2024-11-28 13:37:32+00:00.

Original Title: TIL Camp Century was an Arctic United States military scientific research base in Greenland, it consisted of 21 tunnels through ice, with a total length of 9,800 feet (3.0 km) and was powered by a nuclear reactor