Because deserts are dry, they are ideal places to locate important artifacts from the civilizations that inhabited the land as well as many fossils from the prehistoric eras. That is why deserts are useful to archaeologists in finding artifacts, fossils, and remnants of past civilizations. This is because there are many types of ways artifacts can be preserved. If an artifact is in a wet, moist place, then it will decay very quickly. If the artifact is in a dry place, then it will stay preserved for thousands of years, even millions. Plus, when an artifact is preserved in a desert, it is as though the artifact is packed tightly in bubble wrap because of the surrounding sand or hardened sand. Trying to understand ancient civilizations and why they lived in some of the most "uninhabitable places on earth" is a bit like unraveling riddles. At times, it can be difficult trying to figure out why cultures behaved in certain ways. Part of the difficulty lies in the fact that ancient cultures did not keep an abundance of written records. Also making the exploration tough is frequent lack of physical traces of these civilizations. Buildings crumble. New civilizations are built on the ruins of older civilizations. Desert sands cover some civilizations, while the sands of time cover others. But that's why archaeologists and anthropologists love their jobs!