Crows solve puzzles. Whales have a complex language. Humanity makes one mind-boggling discovery after another about animals. The Voice of Nature explores the latest scientific discoveries about the inner life and behavior of animals and addresses ethical questions about how we should use this knowledge. From animal communication and emotions to rights for nature, this documentary investigates what our responsibility as humans is to act on what we know about animals and their place in the world. Can we entrust ourselves with this responsibility?