In Florida, archaeologists are investigating a site that a century ago sparked a scientific controversy. Today, it's just a strip of land near an airport. But in 1915, it was a spot that became world-famous because of the work of Elias Sellards, Florida's state geologist. Sellards led a scientific excavation of the site, where workers digging a drainage canal found fossilized animal bones and then, human remains. Andy Hemmings of Mercyhurst University is the lead archaeologist on a project that has picked up where Sellards left off a century ago. "Quite literally, where we're standing, they found what they, at...