Underwater archaeology is the study of human history and prehistory through the examination of submerged sites and artifacts. This field involves exploring shipwrecks, sunken cities, and other underwater locations to uncover items like pottery, tools, and structures that provide insights into past cultures and civilizations. Researchers use specialized equipment, such as scuba gear and underwater drones, to access these sites. Notable discoveries in underwater archaeology include the Titanic and ancient Roman shipwrecks, which help historians understand maritime trade, technology, and daily life in different eras.