Today we're talking phosphorus, from exploding stars to urine. Dr. Jim Elser is a limnologist, Director of Flathead Lake Biological Station at Yellow Bay, Bierman Professor of Ecology at the University of Montana, and the Director of Sustainable Phosphorus Alliance. Phosphorus is as essential as water, carbon, or oxygen for agriculture and all life on earth. It's also a non-renewable resource with a natural cycle, which is rapidly accelerating due to human activity. But there are promising innovations in the works that can help offset our influence and solve our phosphorus inefficiencies. Learn more from Jim's new book, "Phosphorus: Past and Future" You can also purchase the book on Amazon here. Jim's Twitter  Thank you for watching and being an inquisitive being.