This is a collection of the Megafauna Mammals that have inhabited the landscape of Minnesota since the glaciers up to modern times. Megafauna are large mammals defined as herbivore vertebrates weighing up to 2,200 pounds (ranging from 45kg-1,000kg+) to carnivores weighing over 220 pounds (21.5kg+). These large, infamous animals required extensive natural resources to support their costly lives. Due to climate change and environmental disruption, many of these animals lost access to the necessary resources required to support their lives, and are now considered extinct. This collection includes Mastodons, Mammuthus primigenius (also known as the wooly mammoth), Castoroides (also known as giant beaver), American bison (still alive today), and the Columbian mammoth (first woolly mammoth). The prominent, widely-known mammoth dominated prehistoric times during the Wisconsin Glaciation over 30,000 years ago; however, due to the ever-changing climate the environment has evolved to no longer support these species.