The Indus Valley civilization didn’t go out with a bang — it slow‑motion crumbled under a series of mega‑droughts that each lasted longer than your average dynasty. New research suggests four back‑to‑back climate smackdowns dried up rainfall, nudged entire cities toward the Indus River, and eventually pushed one of humanity’s earliest urban cultures into a centuries‑long fade‑out. Think ancient Egypt’s contemporary, but with better plumbing and worse luck. It’s a reminder that when the weather decides to switch up the script, even the most sophisticated societies have to improvise — and unlike us, they didn’t even have microplastics to blame.