Evolution: How Life Adapts to a Changing Environment

Why do humans walk on two legs? Why do fish have gills? Life on Earth is incredibly diverse, and part of the reason for this is evolution, or the theory that living things change with time. Evolution: How Life Adapts to a Changing Environment explores the theory of evolution, its history, how we think it works, examples of creatures that have evolved in response to specific circumstances, and what this might mean for the future of our planet. This nonfiction title for students ages 9 to 12 offers an introduction to evolution and the concept that every living species evolves to adapt to the changing environment. This book invites readers to think in terms of geological time, which is useful when considering Earth as an ecosystem that has survived for millennia.