• 3 DVDs

• 17 Animals
• 17 Natural history
• 8 Physical geography
• 2 Climatic changes
• 1 Autumn
• 1 Biology
• 1 Biosphere
• 1 Biotic communities
• 1 Caves
• 1 Conservation of natural resources
• 1 Desert ecology
• 1 Deserts
• 1 Discovery and exploration
• 1 Earth sciences
• 1 Environmental conditions
• 1 Environmental protection
• 1 Forests and forestry
• 1 Fresh water
• 1 Grasslands
• 1 Habitat (Ecology)
• 1 Hydrologic cycle
• 1 Jungles
• 1 Life (Biology)
• 1 Mountains

• 17 Discovery Channel (Firm)
• 15 BBC Worldwide Americas, Inc.
• 8 BBC Earth (Firm)
• 8 Fothergill, Alastair
• 8 Nihon Hōsō Kyōkai
• 6 Berlowitz, Vanessa
• 3 Barton, Miles
• 3 Cordey, Huw
• 2 Linfield, Mark
• 2 Rees, Dan
• 1 Anderson, Justin
• 1 Bass, Karen
• 1 British Broadcasting Corporation. Television Service
• 1 Brownlow, Mark
• 1 Discovery Channel Canada
• 1 Fenton, George
• 1 Films for the Humanities (Firm)
• 1 Jeffs, Kathryn
• 1 Keeling, Jonny
• 1 Kelly, Ned
• 1 Time-Life Films
• 1 Wanda Distribución de Films
• 1 Warner Home Video (Firm)

• 19 English
• 1 French

• 9 Arctic regions
• 9 Polar regions
• 8 Antarctica
• 8 Earth (Planet)
• 1 Antárctica
• 1 Arctic Regions
• 1 Everest, Mount (China and Nepal)
• 1 Himalaya Mountains
• 1 Regiones Árticas

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