Shelter covers archaelogical dig

August 13, 2013 | 7:11 p.m. CDT
The shelter covering the archaeological dig at the Meadowcroft National Historic Site is seen next to part of the natural rock overhand where Native Americans stayed as they traveled through the area thousands of years ago in Avella, Pa., on Aug. 5. A fluke rainstorm has brought Mercyhurst University professor Jim Adovasio back to do new work at the site that launched a furious debate in 1973 over when the first humans came to the Americas.