EP39 - The Search-and-Replace of Life: Decoding the CRISPR Revolution

We talk about curing genetic diseases as if it's magic, a futuristic dream of rewriting our own DNA. But this "magic" is real, it's called CRISPR, and it wasn't invented in a high-tech lab—it was discovered in a bacterium. How can you possibly edit a three-billion-letter code inside a living cell? And how did a microbe's immune system give us the most powerful tool in the history of biology?