Let’s say you flew in a plane from the North Pole to the South Pole, zigzagging over all the continents—and let’s say there were no clouds blocking your view. You would see lots of cities and human developments, but you would also see huge natural areas. Some biomes, such as the tundra (light purple) and taiga (dark green) cover large bands of territory that encircle the Earth and correspond to their latitude. (Designua/ Shutterstock) Read More