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There are plenty of zero-gravity experiments that have been held in the ISS. I think at least the first base is worth it, just to learn more about the conditions of space. We still face one fundamental problem with space travel though, cosmic radiation.

The "first base" wasn't ISS in the 21st century, it was Skylab in the 1970s. But I do agree that the ISS, overall, is a good thing.


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