Why haven’t humans discovered an alien civilization? Maybe they are not as strong as humans Why haven’t humans discovered an alien civilization? Maybe they are not as strong as humans
Accompanied by 4 billion years, how did the moon become the satellite of the earth? Accompanied by 4 billion years, how did the moon become the satellite of the earth?
What are the factors that hinder human beings from entering the first-class civilization? What are the factors that hinder human beings from entering the first-class civilization?
If there is an interstellar war between two powerful alien civilizations, can we observe it? If there is an interstellar war between two powerful alien civilizations, can we observe it?
The fifth “golden tortoise” appeared in Nepal. How did its golden color form? The fifth “golden tortoise” appeared in Nepal. How did its golden color form?
What is the position of mankind in the civilization of the universe? Is it the most backward intelligent civilization? What is the position of mankind in the civilization of the universe? Is it the most backward intelligent civilization?
Scientists predict that by 2779, humans may disappear Scientists predict that by 2779, humans may disappear
4.2 light-years away from the earth, there may be a super-earth, it is a frozen world 4.2 light-years away from the earth, there may be a super-earth, it is a frozen world
Are astronauts paid a lot? Do you still want to be an astronaut after watching it? Are astronauts paid a lot? Do you still want to be an astronaut after watching it?
If an alien civilization invades the earth in the next hundred years, what is the chance of humanity’s victory? If an alien civilization invades the earth in the next hundred years, what is the chance of humanity’s victory?