Calificación
Reparto
Paul Giamatti
Narrator (voice)
Akito Kawahara
Self - Florida Museum of Natural History
Jesse R. Barber
Self - Boise State University
Mary Jane Epps
Self - Mary Baldwin University
Aaron Pomerantz
Self - PhD. Student at the University of California
Constantí Stefanescu
Self - Natural History Museum of Granollers
Jason Chapman
Self - Rothamsted Research
Peter R. Houlihan
Self - Biologist (uncredited)
