Be Smart | The Deadly Chemistry That Made Life Interesting @besmart | Uploaded 1 year ago | Updated 5 minutes ago
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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.

References: sites.google.com/view/great-oxygenation-references/home

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