The first duck-billed dinosaur (plant-eating hadrosaurs) fossils found outside the Americas were discovered on Vega Island, which is off the eastern side of the Antarctic Peninsula. A tooth found there was dated at approximately 66 to 67 million years old. This finding gives more credence to theories about a land bridge connecting South America and Antarctica during this time. It also indicates that this cold climate and ecosystem were once lush and robust enough to support large plant eaters.