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I was reading the Uchuu Kyodai (aka "Space Brothers") manga (it's a story of 2 brothers. One already works for NASA as an astronaut, the older one is trying to get in) and a lady on the TV said it was silly to spend tons of money on space exploration to which the older brother told a story of 1 dimensional ants learning to become 2 and 3 dimensional ants. It's sounds rather silly, but the manga itself is a lot clearer:
http://www.mangareader.net/uchuu-kyoudai/26 Just read it at least until page 8.