• 3 DVDs

• 1 African American chemists
• 1 African American scientists
• 1 Animal behavior
• 1 Animal intelligence
• 1 Black or African American
• 1 Catastrophes (Geology)
• 1 Chemistry
• 1 Chemistry, Pharmaceutical
• 1 Collisions with Earth
• 1 Comets
• 1 Cortisone
• 1 Extinct animals
• 1 Extinction (Biology)
• 1 History
• 1 Julian, Percy Lavon, 1899-1975
• 1 Paleontology
• 1 Physostigmine
• 1 Prejudice
• 1 chemical synthesis

• 2 Public Broadcasting Service (U.S.)
• 2 WGBH Educational Foundation
• 2 WGBH Video (Firm)
• 1 Corporation for Public Broadcasting
• 1 Dye, Christopher
• 1 Hamilton Land & Cattle, Inc
• 1 Hamilton, Doug
• 1 Lyons, Stephen
• 1 PBS Distribution (Firm)
• 1 Pyne, Solana
• 1 Santiago-Hudson, Ruben, 1956-
• 1 Schreiber, Liev
• 1 Smith, Llewellyn
• 1 Tinworth, Rob
• 1 Tyson, Neil deGrasse
• 1 Vance, Courtney B

• 3 English

• 1 United States

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