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The problem with human exploration of space is that you have to spend a lot of money creating an environment that supports human life. A robot doesn't need (much) heat, light or oxygen and no one cries if it dies or can't get back. So it's much cheaper to send a robot.

Robots can also be sent to places where a human would struggle to perform useful experiments - so they can be used to investigate close to volcanoes or undersea and take samples without being hampered by gloves.

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12y ago

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