Some poop in a cave in Oregon has been dated to more than 14,000 years ago and identified as human, adding to other evidence that humans inhabited the Americas before the well-known Clovis people.
Other archaeologists agreed that the findings established more firmly than before the presence of people on the continent at least 1,000 years before the well-known Clovis people, previously thought to be the first Americans. Recent research at sites in Florida and Wisconsin also appears to support the earlier arrivals, and a campsite in Chile indicates migration deep into South America by 14,600 years ago.