Bill Turnbull
Eocene Period
Titanotheres
Ground Sloths
Rhoda Knight Kalt
Rhoda Knight Kalt
Titanothere brontotherium
Giant Moas
Protoceratops
Megacerops platyceras
Preparing educational television program
Permian Reptiles and Amphibians
Ground Sloths and Glyptodonts
Permian Reptiles and Amphibians
Permian Reptiles and Amphibians
Ground Sloths and Glyptodonts
T. rex
Whales
Earliest record
Ordovician Period Paleozoic