howstuffworks: Top 10 Scientific Breakthroughs We Couldn’t Live Without When you stop to think about it, humans are pretty amazing animals. Not only have we managed to stick around in various forms for millions of years, but we’ve also grown into

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howstuffworks: Top 10 Scientific Breakthroughs We Couldn’t Live Without When you stop to think about it, humans are pretty amazing animals. Not only have we managed to stick around in various forms for millions of years, but we’ve also grown into

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