Leeches Uncovered

The Secret Lives of Leeches: 32 Brains, Ancient Origins, and Modern Medicine Leeches have haunted our imagination for centuries—people imagine slimy, blood‑sucking monsters lurking in ponds. But the real leech is a marvel of evolution, boasting 32 tiny brains, a 500‑million‑year legacy, and a surprisingly gentle role in ecosystems and even in modern medicine. In this deep‑dive you’ll learn how leeches work, why they matter, and what you can do to protect these often‑misunderstood animals. ...

June 16, 2026 · 10 min · Rajat Sapkota