• 34 Videos, Slides, Films

• 34 Astronomy
• 7 Exploration
• 7 Outer space
• 7 Space flight
• 1 Biology
• 1 Communicable diseases
• 1 Diseases
• 1 Diseases--Causes and theories of causation
• 1 Drugs--Microbiology
• 1 Earth sciences
• 1 Galaxies
• 1 Genetics
• 1 Geology
• 1 Heredity
• 1 Historical geology
• 1 Life sciences
• 1 Pathogenic bacteria
• 1 Philosophy
• 1 Space
• 1 Stars

• 33 Films Media Group
• 33 Infobase
• 10 PBS (Firm)
• 9 A&E Networks (Firm)
• 3 Cerebellum Corporation (Firm)
• 2 BBC (Firm)
• 2 Economist Group Limited (Firm)
• 1 American Public Television (Firm)
• 1 Australian Broadcasting Corporation (Firm)
• 1 BBC Worldwide Learning (Firm)
• 1 Inside Science (Firm)
• 1 Jerome, Brian A.
• 1 Keck, Nina
• 1 MVD (Firm)
• 1 National Geographic Society (U.S.)
• 1 Video Education America (VEA) (Firm)
• 1 Visual Learning Systems

• 34 English

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