Our DNA holds thousands of dead genes and we’ve only just begun to unravel their stories. But one thing is already clear: we’re not just defined by the genes that we’ve gained over the course of our evolution, but also by the genes that we’ve lost along the way.
Video: Humans have lost many genes over the course of our evolution. Here’s how they helped define us
Kallie Moore | PBS | March 8, 2021
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