結果 : what is the max amount of people earth can hold
2:47

How Many People Can The Earth Hold?

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4:56

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1:00

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26:31

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4:02

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10:29

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13:17

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3:04

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45:00

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4:39

How Many People Would We Need To Colonize Another Earth?

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1:00

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13:59

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21:38

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0:15

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What Would a Journey to the Earth’s Core Be Like?

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17:09

How Far Beyond Earth Could Humanity Spread?

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3:15

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