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Extraterrestrial beings -- Fiction. 2

Interplanetary voyages -- Fiction. 2

Space warfare -- Fiction. 2

All-Star Baseball Game -- Fiction. 1

Armageddon -- Fiction. 1

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Cold War -- Fiction. 1

Martians -- Fiction. 1

Planets -- Environmental engineering -- Fiction. 1

Space flight -- Fiction. 1

Time travel -- Fiction. 1

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