Explaining The Universe on Instagram: "A dam is a structure built across a river or stream to block and control the flow of water. By holding back water, a dam creates a reservoir that can be used for drinking water, irrigation, flood control, and generating hydroelectric power. Dams come in different types, such as concrete gravity dams, curved arch dams, and embankment dams made of earth or rock. They play an important role in managing water resources and producing renewable energy, but they c