It seems that it is not unlikely that humanity will be able to discover traces left by ancient alien civilizations, and it is even possible that we will find aliens among us.
According to American businessman Elon Musk, if physics is correct, the universe is about 13.8 billion years old, and the Earth is about 4.5 billion years old. If we survive as a civilization for a million years, that will be an achievement. We will likely reach every part of the galaxy.
Commenting on the news claiming “the presence of aliens among us,” Musk said that he personally had not seen evidence of the existence of aliens, and pointed out that “for some reason, many of these people who say that aliens are among us believe that we have not reached the moon.”
He continued: The existence of civilization is an unstable and rare matter. We must be aware that human civilization is a small candle in the darkness. We must do everything possible so that this candle does not go out.
Musk hopes that his company, SpaceX, will be able to deliver humans to the moon within 5 years, and to Mars within 7-9 years.
He also stated that after being able to exist on two planets, people will be able to reach other planets and other systems.