Jeff Bridges
Self - Narrator (voice)

Piers Sellers
Self - NASA Astronaut & Research Scientist

Wesley Clark
Self - General

Self - General

Oren R. Lyons
Self - Dist Prof of American Studies

Self - Dist Prof of American Studies

Timothy Morton
Self - Philosopher & Author

Self - Philosopher & Author

Bob Inglis
Self - Former Congressman (R)

Self - Former Congressman (R)

Rich Pancost
Self - Professor of Biogeochemistry

Ruth Gates
Self - Marine Biologist; Dir. Hawaii Institute of Marine Biology

Renée Lertzman
Self - Author

Self - Author

Bruce Hood
Self - Prof of Developmental Psychology

Self - Prof of Developmental Psychology

Self - Prof of Developmental Psychology

Mark Plotkin
Self - Ethnobotanist

Self - Ethnobotanist

Amy Jacobson
Self - Evolutionary Anthropologist

Self - Evolutionary Anthropologist

Daniel Goleman
Self - Psychologist

Self - Psychologist

Self - Psychologist

Stephan Lewandowsky
Self - Professor of Cognitive Psychology

Self - Professor of Cognitive Psychology

Joseph Tainter
Self - Professor of Anthropology

Self - Professor of Anthropology

Ugo Bardi
Self - Prof of Physical Chemistry

Self - Prof of Physical Chemistry

Self - Prof of Physical Chemistry

Paul Roberts
Self - Journalist; Author

Self - Journalist; Author

Ian Robertson
Self - Cognitive Neuroscientist

Self - Cognitive Neuroscientist

Self - Cognitive Neuroscientist