
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,...

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,...