The most powerful proton conductor in the natural world is a weird, jelly-like substance that lives inside a shark's head. That's according to a recent study, which found that the material that makes up electricity-sensing shark organs called the ampullae of Lorenzini is almost as conductive as some of the most high-tech materials made by man. Ampullae of Lorenzini were discovered in sharks more than 300 years ago, but it's now clear that the dense networks of jelly-filled canals in the heads of sharks, rays and other cartilaginous fish end in highly sensitive electroreceptors, capable of sensing electric signals from miles away. With every twitch of muscle and flick of a fin, animals in the ocean — including humans — emit a faint electric field, and the ampullae help sharks detect that motion as they swim in search of food. The AoL jelly's conductivity was not that much lower than that of Nafion, a state-of-the-art synthetic material used in things like batteries and fuel cells. Understanding how the jelly works could help researchers who are trying to build better versions of those technologies. https://www.washingtonpost.com/news...gans-are-even-more-powerful-than-we-realized/
