• 2 DVDs

• 19 Physics
• 13 Research
• 8 Quantum theory
• 7 Astronomy
• 4 Evolution (Biology)
• 4 Life (Biology)
• 3 Astrophysics
• 3 Big bang theory
• 2 Philosophy
• 1 Atoms
• 1 Barbour, Julian B
• 1 Biophysics
• 1 Brain
• 1 Civilization
• 1 Constitution
• 1 Dark energy (Astronomy)
• 1 Dark matter (Astronomy)
• 1 Folklore
• 1 Gravity
• 1 Greene, Brian, 1963-
• 1 Hawking, Stephen, 1942-2018
• 1 Hispanic Americans
• 1 History
• 1 Indians of North America

• 17 Films Media Group
• 12 Harvard-Smithsonian Center for Astrophysics. Science Media Group
• 11 Annenberg Learner (Firm)
• 11 Harvard University. Department of Physics
• 11 Lotman, Mo
• 10 Films for the Humanities & Sciences (Firm)
• 4 BBC Worldwide Ltd.
• 4 Grainger, Clive A.
• 4 Infobase
• 4 Lester, Adrian
• 4 Mcelheny, Tobias
• 4 Public Broadcasting Service (U.S.)
• 2 Big Think
• 2 Griswold, Alex
• 1 Allardi, Steven J.
• 1 Anglia Television
• 1 Annenberg Media
• 1 Australian Broadcasting Corporation
• 1 BBC Worldwide Ltd
• 1 Barbour, Julian B.
• 1 Berengut, Julian
• 1 DCD Media (Firm)
• 1 Discovery Communications, Inc
• 1 Draper, Hannah
• 1 Duffy, Neal

• 36 English
• 1 Multiple languages
• 1 Spanish

• 1 Peru
• 1 Universe

Limit year range