Whales and Wolves are changing the environment in an interesting way: from the top of the food chain all the way down. It is called a trophic cascade by scientists, and highlights the importance of how truly interconnected one species is with another. They can alter the ozone, as you will see in the whale video, and even change the course of rivers, as you will see in the Wolf video.
These kinds of stories are important to my research because they are inspiring and rejuvenating. It gives me something to keep marching for.