<p><em>New study sheds light on the previously overlooked Mongolian Arc—a monumental wall system in eastern Mongolia spanning 405 kilometers. This discovery not only reveals the significance of this ancient architectural marvel but also prompts crucial questions about the motives, functionality, and broader implications of such colossal constructions. Their findings contribute to a larger multidisciplinary project exploring historical wall systems and their socio-political, economic, and environmental impacts, marking a pivotal milestone in understanding ancient civilizations and their enduring legacies.</em></p>