Narrator (voice)

Paul Giamatti

Acting

Self - Florida Museum of Natural History

Akito Kawahara

Acting

Self - Boise State University

Jesse R. Barber

Acting

Self - Mary Baldwin University

Mary Jane Epps

Acting

Self - PhD. Student at the University of California

Aaron Pomerantz

Acting

Self - Natural History Museum of Granollers

Constantí Stefanescu

Acting

Self - Rothamsted Research

Jason Chapman

Acting

Self - Biologist (uncredited)

Peter R. Houlihan

Acting