Furry, warm-blooded mammals live all around the world, from the driest deserts to the wettest forests.
We have a whale of a time answering questions about these ocean-dwelling mammals with paleontologist Nick Pyenson, author of Spying on Whales: The Past, Present and Future of Earth’s Most Awesome Creatures.
A group of endothermic (warm-blooded) vertebrates who have hair and feed their offspring through milk production.