Kristin Fisher, CNN



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Why it’s so difficult to land on the moon, even five decades after Apollo

Hundreds of thousands of miles beyond Earth, a phone booth-size spacecraft is en route to take on a challenge no vehicle launched from the United States has attempted in more than 50 years.

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Why it’s difficult to land on moon five decades after Apollo

Hundreds of thousands of miles beyond Earth, a phone booth-size spacecraft is en route to take on a challenge no vehicle launched from the United States has attempted in more than 50 years.

Tease photo

Surgery in space: Tiny remotely-operated robot completes first simulated procedure at space station

A tiny surgical robot in residence at the International Space Station completed its first surgery demo in zero gravity on Saturday, developers of the technology exclusively told CNN.

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