The idea of dividing the world into geographical zones is ancient. Sovereignty and influence over natural resources is at the heart of most global divisions. A peaceful transition away from fossil ...

The numbers refer to the U.S. Department of Agriculture’s Plant Hardiness Zone Map, which divides the country into geographic zones that have similar average winter temperatures. Higher zone ...

The focus of physical geography is on the zone of the land, ocean, and atmosphere containing most of the world's organic life. Physical geography not only describes natural phenomena near the surface ...