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It's Okay to Be Smart
The Deadly Chemistry That Made Life Interesting
Season 11
Episode 10
Life’s been around on Earth for at least 3.7 billion years. But for most of that time, it was incredibly boring — just simple little cells squirming around in water. It only got interesting in the last few hundred million years. And that might never have happened without the help of a deadly, but also life-giving, element.
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