Mammals are absolutely magnificent members of our Earth! These animals have adapted over the course of tens of millions of years to have a variety of shared characteristics like fur, food production for babies (milk) and energy conservation (Homeothermy or a maintained body temperature). There are approximately 5,400 species ranging from the smallest of Bumblebee Bats to the largest animal to ever live, the Blue Whale. Most of these creatures do have live birth as well, however there are a...