Penguin feathers inspired a self-heating coating for sensors

Penguins must maintain their body temperature and stay waterproof while navigating some of the harshest environments on Earth. Their secret lies in their feathers, which contain nano-sized structures called melanosomes that absorb light to generate heat, paired with a physical surface texture that prevents water droplets from sticking. This dual-action mechanism allows the birds to stay dry and warm even after diving into freezing waters.