Hibernation is a way for mammals to survive through the winter if they cannot migrate. Not all mammals hibernate, but those who do, will spend two to three weeks with their body temperature two to three degrees above freezing, their heart rate greatly slowed, and their breaths per minute down to four or five. Like many other animals in the animal kingdom, we obtain many things from mammals. They are a very important part of our ecosystem and without mammals, we would be missing a very big link. Sadly, a species of mammals becomes extinct approxamately once every couple of weeks.
Mammals are the highest form of animal life.
In no other class is there such diversity, intelligence, and adaptation. They have managed to cover all of the continents, and brave every climate condition. Mammals as a class are strong survivors, and hopefully will continue to be that way.