The crossword solution for the term ICE AND IRON is AGES, which refers to the two distinct periods of human history. The Iron Age was a period of human history that followed the Stone Age and preceded the Industrial Revolution. During this period, humans began to use iron tools and weapons, which allowed them to develop more advanced technologies. The Ice Age was a period of colder temperatures and glacial expansion that occurred during the Pleistocene epoch. During this period, much of the Earth's land was covered in ice sheets, which caused sea levels to drop and allowed humans to migrate to new areas.