A frog packed with tadpoles! How could that be? No one had ever seen this species before, and they had certainly never seen a frog full of polliwogs. This is the story of a frog that stumped scientists for decades. This fascinating tale of scientific discovery chronicles “how we know what we know” about the exotic Darwin’s frog, including the surprising discovery that the male broods the tadpoles in his vocal sac, and it details the creation of a program to protect the species from a deadly fungus.