MacFadden spoke informally about life in in Florida thousaands of years before statehood. Trueman Hill of Hilliard showed dozens of bones, teeth and fossils he has collected in Northwestern Nassau County. Graduating from Cornell University in 1971, he's received numerous awards and accolades during his long career as a teacher of paleontology and geological sciences.
He has been faculty curator and administrator at the Florida Museum of Natural History in Gainesville since 1977. He has also served in several capacities in the Society of Vertebrate Paleontology and is currently program director at the National Science Foundation in Arlington, Virginia.
As he pointed out, you may determine an animal’s primary diet from its teeth. The mastodon, for example, was a grazer – an animal which eats grass like a cow; while the mammoth was a browser – an animal whose diet primarily consists of leaves and twigs. Both were relatives of the present day elephant.