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
The neighboring galaxy 4 light-years away, there may be living planets in the habitable zone, humans should be careful The neighboring galaxy 4 light-years away, there may be living planets in the habitable zone, humans should be careful
Scientists have discovered that the solar system may be in a “cosmic cavity” with a diameter of 2 billion light-years. Scientists have discovered that the solar system may be in a “cosmic cavity” with a diameter of 2 billion light-years.
Alien civilizations may use neutrinos for communication, and in the future humans may also hope to hear Alien civilizations may use neutrinos for communication, and in the future humans may also hope to hear
Alien civilizations may have already observed the earth, but the cosmic distance is exaggerated, and they cannot touch each other. Alien civilizations may have already observed the earth, but the cosmic distance is exaggerated, and they cannot touch each other.
Scientists say: Alien civilizations may have been to the earth in 2017, has the earth been exposed? Scientists say: Alien civilizations may have been to the earth in 2017, has the earth been exposed?
Why can only photons reach the speed of light? Where does its power come from? Why can only photons reach the speed of light? Where does its power come from?
Humans may be the “prisoners” of alien civilization exiled to the earth, and the moon is a monitor? Humans may be the “prisoners” of alien civilization exiled to the earth, and the moon is a monitor?
63 years ago, mankind had a crazy plan: what are the consequences of blowing up the moon? 63 years ago, mankind had a crazy plan: what are the consequences of blowing up the moon?
Is the thing in the dream true? There are three explanations for dreams, the first one is scary Is the thing in the dream true? There are three explanations for dreams, the first one is scary