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 who have evolved in response to specific circumstances, and what this might mean for the future of our planet.

Carla Mooney is the author of several Nomad Press books including Comparative Religion: Investigate the World Through Religious Tradition, The U.S. Constitution: How Democracy Works, and The Industrial Revolution: Investigate How Science and Technology Changed the World. Carla lives in Pittsburgh, Pennsylvania.