• 2 Videos, Slides, Films

• 2 Explorers
• 2 Scientists
• 1 Astronomy
• 1 Exploration
• 1 Outer space
• 1 Space flight
• 1 World history

• 2 Films Media Group
• 2 Infobase
• 1 A&E Networks (Firm)
• 1 American Public Television (APT) (Firm)

• 2 English

• 2 Internet videos
• 2 Video recordings for the hearing impaired

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