• 2 DVDs

• 1 Animals
• 1 Biotic communities
• 1 Brain
• 1 Desert ecology
• 1 Dreams
• 1 Evolution (Biology)
• 1 Habitat (Ecology)
• 1 Human evolution
• 1 Human genetics
• 1 Inbreeding
• 1 Mutation (Biology)
• 1 Physical anthropology
• 1 Physical geography
• 1 Physiological aspects
• 1 Quadrupedalism
• 1 Research
• 1 Sleep
• 1 Subconsciousness
• 1 Unconscious, Psychology
• 1 Variation
• 1 Variation (Biology)
• 1 physiology

• 2 Public Broadcasting Service (U.S.)
• 1 Allen, Penny
• 1 Apsell, Paula S
• 1 Attenborough, David, 1926-
• 1 BBC Worldwide Americas, Inc
• 1 Berlowitz, Vanessa
• 1 Brownlow, Mark
• 1 Byatt, Andrew
• 1 Canadian Broadcasting Corporation
• 1 Carroll, Sean B
• 1 Cordey, Huw
• 1 Discovery Channel (Firm)
• 1 Effros, Jamie
• 1 Fothergill, Alastair
• 1 Harrison, Jemima
• 1 Holt Productions
• 1 Holt, Sarah
• 1 Holt, Sarah, 1956-
• 1 Humphrey, Nicholas
• 1 Keeling, Jonny
• 1 Klein, Richard
• 1 Linfield, Mark
• 1 Nihon Hōsō Kyōkai
• 1 Nova (Television program)

• 3 English

• 1 Cold regions
• 1 Earth (Planet)
• 1 Eastern Hemisphere
• 1 Northern Hemisphere
• 1 Southern Hemisphere
• 1 Tropics
• 1 Western Hemisphere

• 3 Documentary television programs
• 3 Video recordings for the hearing impaired
• 2 Science television programs
• 2 Video recordings for people with visual disabilities
• 1 Educational television programs
• 1 Nonfiction television programs
• 1 Television mini-series
• 1 Television series
• 1 Television special

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