Name	Known for
Corey Johnson Narrator (voice) Narrator (voice) See fewer	Morbius (2022)
Richard Goldfarb Self - Geologist, U.S. Geological Survey (as Richard Goldfarb PhD) Self - Geologist, U.S. Geological Survey (as Richard Goldfarb PhD) See fewer	How the Earth Was Made (2009)
Chris Ralph Self - Gold Journalist / Prospector Self - Gold Journalist / Prospector See fewer	How the States Got Their Shapes (2011)
John Marma Self - Geologist, Newmont Mining Corporation Self - Geologist, Newmont Mining Corporation See fewer	How the Earth Was Made (2009)
John Muntean Self - Geologist, University of Nevada Reno (as John Muntean PhD) Self - Geologist, University of Nevada Reno (as John Muntean PhD) See fewer	How the Earth Was Made (2009)
Wade Hodges Self - Geologist, Nevada Exploration Inc. Self - Geologist, Nevada Exploration Inc. See fewer	How the Earth Was Made (2009)
Absalom Lehman Self - Farmer (archive footage) Self - Farmer (archive footage) See fewer
John Livermore Self - Geologist / Gold Prospector (archive footage) Self - Geologist / Gold Prospector (archive footage) See fewer
James W. Marshall Self - Carpenter / Sawmill Operator (archive footage) Self - Carpenter / Sawmill Operator (archive footage) See fewer