A los 55 años murió Happy, la elefanta que se reconoció en un espejo y protagonizó un histórico debate sobre los derechos animales.

Happy, a Bronx Zoo elephant who gave researchers new insight into the animal's behavior and became the crux of a closely watched animal rights case, has been euthanized at age 55.

A Bronx Zoo elephant who gave researchers new insights and became the crux of a closely watched animal rights case has died.