50: The Oldest Evidence for Life?
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50: The Oldest Evidence for Life?
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Finally, 3.7 billion years ago, we reach some of the strongest evidence for life on Earth yet. It takes a while to find, and it only looks like a few dark crystals, but it's better than anything else we've seen so far. Along the way, we'll meet three scientists who helped define the quest for Earth's oldest fossils, including one of my old bosses.
Extra Credit: Sharpen your pencils, spackle some cracks, or thank a mentor in your life.
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