Is the world in which humans live real? The odds may be less than one in a billion Is the world in which humans live real? The odds may be less than one in a billion
Restricted by many factors, humans may never leave the solar system Restricted by many factors, humans may never leave the solar system
Scientists deciphered a mysterious signal 50,000 years ago, the content confuses people Scientists deciphered a mysterious signal 50,000 years ago, the content confuses people
Mysterious signals appear frequently, and extraterrestrial civilizations are calling for mankind? Mysterious signals appear frequently, and extraterrestrial civilizations are calling for mankind?
The civilization of the universe can be divided into four levels. How many levels of civilization will human beings become in the future? The civilization of the universe can be divided into four levels. How many levels of civilization will human beings become in the future?
Why should the earth’s oxygen content be maintained at about 21%? What are the consequences of high oxygen content? Why should the earth’s oxygen content be maintained at about 21%? What are the consequences of high oxygen content?
The evolutionary path that life generally chooses is aging, not immortality. Why? The evolutionary path that life generally chooses is aging, not immortality. Why?
If the spacecraft is too fast, will it be destroyed by cosmic debris? The probability is so small that you don’t believe it If the spacecraft is too fast, will it be destroyed by cosmic debris? The probability is so small that you don’t believe it
In the animal world, males are generally more beautiful than females. Why is the opposite in the human world? In the animal world, males are generally more beautiful than females. Why is the opposite in the human world?
Could there be special life in the sun? Plasma life forms may exist in the universe Could there be special life in the sun? Plasma life forms may exist in the universe