The Ice Ages gripped the Earth's Northern Hemisphere for over two million years. The Midwest teemed with amazing mammals of huge size during the last phase of glaciers covering much of the Midwest. Almost all of these fascinating animals then disappeared over a relatively short part of geologic time called the Late Pleistocene. This book explores the vast array of creatures that once roamed what is now your back yard. What happened to them is highly controversial. Humans arrived in the Midwest shortly before the giant mammals demise. Read about the work done by scientists laboring to understand these giant mammals and unravel the mystery of their disappearance.