Most scientists agree that human beings originated in Africa. The first humans to come to North and South America has long been believed to be the Clovis people. But a 2002 discovery in the Paisley Caves in Oregon has challenged this view. Archaeologists discovered animal bones and fossilized excrement, known as coprolites. Some of these coprolites included human molecules, providing the earliest human DNA ever found in the Americas. This discovery has given archaeologists new clues to better understand the earliest humans found in North America.