8K views · 239 reactions | If aliens exist, they could have been observing #Earth for 5,000 years, according to a new study published on Wednesday in the journal Nature. | China Daily | Facebook
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8K views · 239 reactions | If aliens exist, they could have been observing #Earth for 5,000 years, according to a new study published on Wednesday in the journal Nature. | China
China Daily. . If aliens exist, they could have been observing #Earth for 5,000 years, according to a new study published on Wednesday in the journal Nature.
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