Chicago’s lake pancakes captured by mbraeuner773 🤩 💡 Ice discs form on the outer bends in a river where the accelerating water creates a force called 'rotational shear', which breaks off a chunk of ice and twists it around. As the disc rotates, it grinds against surrounding ice — smoothing into a circle. 🏷️ Tag a winter lover! 📸 mbraeuner773 📍Chicago #chi #artofchi #likechicago #chicity #chicagoriver #visitchicago