Robert BakkerSelf - Paleontologist Houston Museum of Natural Science Andrew FarkeSelf - Paleontologist Raymond M. Alf Museum of Paleontology Carl MehlingSelf - American Museum of Natural History Paul OlsenSelf - Paleontologist Lamont-Doherty Earth Observatory Alan LangheinrichSelf - Langs Fossils Alexander GatesSelf - Rutgers University Newark Guy RobinsonSelf - Paleo ecologist Fordham University Betsy MccullySelf - Author City at Waters Edge Thomas HoltzSelf - Paleontologist, Univ. of Maryland Trevor S. ValleSelf - Paleontologist George C. Page Museum La Brea Tar Pits Luis ChiappeSelf - Paleontologist Natural History Museum of Los Angeles County Kirk JohnsonSelf - Paleobotanist Denver Museum of Nature & Science Ken CarpenterSelf - Paleontologist Denver Museum of Nature & Science Stephen GodfreySelf - Paleontologist Calvert Marine Museum John M. HarrisSelf - Paleontologist George C. Page Museum La Brea Tar Pits Tim SamuelsonSelf - Cultural Historian, City of Chicago Michael EverhartSelf - Paleontologist Sternberg Museum of Natural History Anthony FiorilloSelf - Paleontologist Museum of Nature and Science Dallas Richard StuckySelf - Paleontologist Denver Museum of Nature & Science Louis JacobsSelf - Paleontologist Southern Methodist University Bob RaynoldsSelf - Geologist Denver Museum of Nature & Science Kristen BrownSelf - Excavator George C. Page Museum La Brea Tar Pits Tom DemereSelf - Paleontologist San Diego Natural History Museum Michael FixSelf - Geologist Univ. of Missouri-St. Louis Pamela OwenSelf - Paleontologist Texas Natural Science Center Steven HolenSelf - Archaeologist Denver Museum of Nature & Science Raymond WiggersSelf - Author, Geology Undefoot in Illinois Michael PolcynSelf - Paleontologist Southern Methodist University Peter KranzSelf - Paleontologist Dinosaur Fund John AldersonPaleontologist John BreyerSelf - Geologist Texas Christian University Donald MikulicSelf - Geologist Illinois State Geological Survey Ellin BeltzSelf - Paleontologist Billy BakerSelf - Superintendent Dinosaur Valley State Park Robert SternSelf - Geoscientist Scott DemelSelf - Archaeologist The Field Museum, Chicago David PowarsSelf - Geologist USGS Thomas PraySelf - Naturalist, Forest Preserve District DuPage County, Illinois Richard HiltonSelf - Paleontologist Sierra College Derek MainSelf - Paleontologist University of Texas at Arlington Guy DarroughSelf - Curator Bollinger County Museum of Natural History Darryl RehrDirector / Escritor Douglas CohenDirector / Productor ejecutivo Jim HenseDirector / Escritor Louis TarantinoDirector / Productor ejecutivo Savas GeorgalisEscritor / Field Producer Andy PapadopoulosEscritor / Productor Tiffany ThompsonAsistente de producción Stanley BrownAsistente de producción 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 
