Lance Lewman
Narrator
Acting
Kirk Johnson
Himself - Denver Museum of Nature & Science
Acting
Daniel Fisher
Himself - University of Michigan
Acting
Ian Miller
Himself - Denver Museum of Nature & Science
Acting
Joseph Sertich
Himself - Vertebrate Paleontologist
Acting
Eugene Schweig
Himself - United States Geological Survey
Acting
Richard Stucky
Himself - Denver Museum of Nature & Science
Acting