North and South America were the last continents to be settled by humans, but exactly when that started is a topic that has divided archaeologists.
원문출처 : https://www.cnn.com/2021/09/23/americas/footprints-humans-arrive-in-north-america-scn/index.html
원문출처 : https://www.cnn.com/2021/09/23/americas/footprints-humans-arrive-in-north-america-scn/index.html