Sometimes you start something and have no idea where it will lead. So it was with Eduardo Filgueiras, a struggling guitarist whose family worked in an unusual business in Rio de Janeiro: They farmed toads. Filgueiras figured out a way to take the small toad skins and fuse them together, creating something large enough to sell.
A controlled fishing system in the Brazilian Amazon Basin is helping to save the endangered pirarucú fish. Methods to limit illegal fishing have led to large increases in the pirarucú population.
Sometimes you start something and have no idea where it will lead. So it was with Eduardo Filgueiras, a struggling guitarist whose family worked in an unusual business in Rio de Janeiro: They farmed toads. Filgueiras figured out a way to take the small toad skins and fuse them together, creating something large enough to…