This is an updated version of a story first published on Sept. 21, 2025. The original video can be viewed  here .  Biologist Charles Darwin began crafting his theory of evolution on a trip to the Galapagos Islands, where he discovered animals had developed unique traits that varied from island to island. Nearly two centuries later, on a different island, scientists aren't just observing evolution, they now have the technology to shape it. We met a team of modern-day Darwins on Nantucket, where,