"The warm blooded, milk-producing mammal has the most complete and developed fauna of internal tissues on Earth, and although it is relatively small in number, it is the true ruler. Mammals diverged from reptiles 200 million years ago and have been filled with the entire planet. Their species range from rodents to whales to primates. We humans are only a subspecies of mammals. Even if they are far away from us, they still have many common characteristics...