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What if our space station were actually a big, hollowed-out asteroid? What if we didn't have to ship our metal to space, but mined ore from an asteroid, with our robots turning it into more robots and space exploration vehicles?

It's not nearly as far-fetched as it sounds. Some kids built a lego robot that builds lego robots. My three-year old built a lego bulldozer that scoops up legos. Between them, that's proof of concept. If we can spend $500 billion on a war, why can't we spend a few on getting our kids to space?
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