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How can humans achieve interstellar navigation?
How can humans achieve interstellar navigation?
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Why did the alien civilization not come to visit the earth? Scientists say: the cost of visiting the earth is too high
Why did the alien civilization not come to visit the earth? Scientists say: the cost of visiting the earth is too high
June 12, 2021
If the sun is removed by advanced civilization, how long will it take for humans to discover it?
If the sun is removed by advanced civilization, how long will it take for humans to discover it?
June 12, 2021
27 years ago, without the protection of Jupiter, mankind might have withdrawn from the stage of history
27 years ago, without the protection of Jupiter, mankind might have withdrawn from the stage of history
June 12, 2021
The earth was formed 4.6 billion years ago, and the inside is a high-temperature world. Will there be a day of cooling down?
The earth was formed 4.6 billion years ago, and the inside is a high-temperature world. Will there be a day of cooling down?
June 12, 2021