Meet the glass frog — one of nature’s most astonishing examples of transparency. Native to Central and South American rainforests, these tiny frogs (family Centrolenidae) have translucent skin on their bellies, letting you see their organs, beating heart, and even eggs through the skin. 🔬 How do they stay see-through? Glass frogs pull off a biological trick: during rest, they move nearly 90% of their red blood cells into their liver, which acts as a mirror-like storage compartment. With fewer red cells circulating, their bodies appear almost invisible — a perfect camouflage against predators. 🌿 Life in the canopy They live on leaves above streams, where females lay their eggs. Males guard these clutches until tadpoles hatch and drop into the water below — a rare example of male parental care in amphibians. 🧠 Why scientists care Researchers study glass frogs to understand transparency and blood cell storage, which could inspire future medical imaging or circulatory research. 💬 W...