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      MAN ON THE MOON:

      MAN ON THE MOON:

      Aldrin is photographed on the lunar surface by Armstrong, who is just visible, alongside the lunar module, in the reflection of Aldrin's helmet visor.

      — NASA

      The Moon in 4K

      Using updated survey data a stunning ultrahigh-definition tour of the lunar surface brings our satellite to life

      April 15, 2018 — Caleb A. Scharf

      Why We Need Our Zzzs

      Why We Need Our Zzzs

      Vital for Memory, Mood and More