"Forensic dogs have been able to detect graves that are thousands of years old,” Pettigrew said. “So finding something 80 years old doesn't sound to me like a stretch."
Pettigrew said the dogs "alerted at the very spot" where the search organizers theorize Earhart expired, but a subsequent dig found no leftover bones. The crew collected soil samples at the site in a long shot bid to extract remnant DNA of the presumed castaway.
This summer's expedition was organized and led by Tom King, an archaeologist, author and TIGHAR board member from Silver Spring, Maryland. Besides the dog handlers and land-based excavation, King recruited an underwater search team.
read more here @ KUOW