Questions on 'space travel and exploration' tag
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144
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136
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134
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128
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139
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135
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135
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1
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143
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126
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172
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176
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1
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462
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1
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494
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1
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414
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366
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393
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1
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463
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1
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420
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0
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0
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371
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0
answer
386
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1
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421
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1
answer
441
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1
answer
434
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1
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416
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1
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425
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1
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465
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1
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438
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1
answer
468
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417
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1
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400
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1
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432
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1
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401
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382
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1
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430
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answer
374
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