30 Unusual Archaeological Finds In The US We Still Can’t Explain

3. ROCK SHELTER HAS NO AGE

In Avella, Pennsylvania, a farmer discovered an ancient Native American rock shelter. The site is called Meadowcroft, and it’s intriguing because no one can give the place a date yet. In 1973, an archaeologist excavated the site for the first time and concluded the age of the site somewhere between 16,000 and 19,000 years old. There’s an ongoing debate as some scholars say Meadowcroft is older than any other Native American place, but studies reveal it could be younger than 16,000 years.