Robert BakkerSelf - Paleontologist Houston Museum of Natural Science Andrew FarkeSelf - Paleontologist Raymond M. Alf Museum of Paleontology Paul OlsenSelf - Paleontologist Lamont-Doherty Earth Observatory Alan LangheinrichSelf - Langs Fossils Guy RobinsonSelf - Paleo ecologist Fordham University Carl MehlingSelf - American Museum of Natural History Alexander GatesSelf - Rutgers University Newark Betsy MccullySelf - Author City at Waters Edge Kirk JohnsonSelf - Paleobotanist Denver Museum of Nature & Science Trevor S. ValleSelf - Paleontologist George C. Page Museum La Brea Tar Pits Ken CarpenterSelf - Paleontologist Denver Museum of Nature & Science Thomas HoltzSelf - Paleontologist, Univ. of Maryland Michael EverhartSelf - Paleontologist Sternberg Museum of Natural History John M. HarrisSelf - Paleontologist George C. Page Museum La Brea Tar Pits Louis JacobsSelf - Paleontologist Southern Methodist University Peter KranzSelf - Paleontologist Dinosaur Fund Luis ChiappeSelf - Paleontologist Natural History Museum of Los Angeles County Tim SamuelsonSelf - Cultural Historian, City of Chicago Richard StuckySelf - Paleontologist Denver Museum of Nature & Science Anthony FiorilloSelf - Paleontologist Museum of Nature and Science Dallas Kristen BrownSelf - Excavator George C. Page Museum La Brea Tar Pits Bob RaynoldsSelf - Geologist Denver Museum of Nature & Science Tom DemereSelf - Paleontologist San Diego Natural History Museum Stephen GodfreySelf - Paleontologist Calvert Marine Museum Michael FixSelf - Geologist Univ. of Missouri-St. Louis Ellin BeltzSelf - Paleontologist John AldersonPaleontologist Robert SternSelf - Geoscientist David PowarsSelf - Geologist USGS Donald MikulicSelf - Geologist Illinois State Geological Survey Richard HiltonSelf - Paleontologist Sierra College Guy DarroughSelf - Curator Bollinger County Museum of Natural History Raymond WiggersSelf - Author, Geology Undefoot in Illinois Billy BakerSelf - Superintendent Dinosaur Valley State Park Steven HolenSelf - Archaeologist Denver Museum of Nature & Science Michael PolcynSelf - Paleontologist Southern Methodist University Pamela OwenSelf - Paleontologist Texas Natural Science Center Derek MainSelf - Paleontologist University of Texas at Arlington Scott DemelSelf - Archaeologist The Field Museum, Chicago John BreyerSelf - Geologist Texas Christian University Thomas PraySelf - Naturalist, Forest Preserve District DuPage County, Illinois Darryl RehrRegista / Sceneggiatore Douglas CohenRegista / Produttore Esecutivo Jim HenseRegista / Sceneggiatore Louis TarantinoRegista / Produttore Esecutivo Savas GeorgalisSceneggiatore / Field Producer Andy PapadopoulosSceneggiatore / Produttore Sven BerkemeierProduttore Tiffany ThompsonProduttore Associato Stanley BrownProduttore Associato Chris McCaffreyCinematographer Chris LaineCinematographer Kenneth StipeCinematographer Gregory AndrackeCinematographer Daniel DvorakCinematographer Norm JohnstonCinematographer Jim LangleyCinematographer Max J. MillerCinematographer Jason NewfieldCinematographer Namita ChopraCoordinating Producer: Discovery Channel Kelly FicklinPost Producer Brooke RunnetteExecutive Producer: Discovery Channel Steffen SchlachtenhaufenField Producer 
