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Subject
- Exploration18
- Explorers16
- Discovery and exploration8
- Astronauts7
- Interplanetary voyages6
- Lunar exploration4
- Apollo 11 (Spacecraft)3
- Bear attacks3
- Betrayal3
- El Dorado3
- Exploration of outer space3
- Glass, Hugh, approximately 1780-approximately 18333
- Human-alien encounters3
- Man-woman relationships3
- Project Apollo (U.S.)3
- Space flight to the moon3
- Spanish3
- Travel3
- Underwater exploration3
- Aguirre, Lope de, -15612