Potassium-Argon Dating is a radiometric dating technique used to determine the age of rocks and minerals. It relies on the radioactive decay of potassium-40 to argon-40, allowing scientists to date geological formations that are millions of years old. This method is particularly useful for dating volcanic rocks and is often applied in archaeology and paleontology to understand the timing of events in Earth's history. By measuring the ratio of potassium to argon, researchers can estimate when the rock was formed, providing valuable insights into the age of fossils and ancient artifacts.