✨ Marimo (Aegagropila linnaei) ✨ Not just “moss balls” — they’re rare spherical algae found in Japan, Iceland, Scotland & beyond. 🌀 How they form Rolling waves sculpt loose filaments into perfect balls. Inside, scientists discovered annual rings & even microbial layers that help them grow big. 🌡️ Why endangered Pollution, warming lakes & habitat loss caused famous colonies (like in Iceland’s Lake Mývatn) to collapse within years. Even Japan’s Lake Akan marimo — a protected treasure — has shrun