The past history of the earth is still vague, the world's top ten unsolved mysteries are still unsolved, and the distant starry sky and universe are so silent. How many secrets are there in this world that we don't know? There is no answer.
Scientists have only scratched the surface of the subject of time. Do you know the trajectory of time? Do you know the flow speed of various space-time time? Will time accumulate? If space is disillusioned, will time still exist?
How much do you know? How much do you know? We still know very little, and there is still much to learn.
Just like the time traveler, such a strange existence.
They may be lonely, ordinary, or cold, but no one will see them easily, and if they have seen them, they will never forget them.
What you are reading now is their story.