Hawking once warned, "Don't take the initiative to contact aliens at any time." Are there really aliens?

I think it makes sense! If aliens are behind us, or at the same level as us, then even if they make contact, they are so far away that they cannot reach each other's planets. This kind of contact is meaningless and can only prove that there is life on other planets~ If aliens The aliens are more advanced than us, far beyond their reach, so the resources on the earth are not worth mentioning to them. The universe is so big and there is so much energy, why bother to invade the earth~, they don’t care at all, but There is not necessarily no danger. For example, ants are not worth mentioning to us humans. They live on the earth, can they sense the existence of humans?

Hawking is not only an outstanding cosmologist, but also a thinker who is always concerned about the progress and development of human behavior. He has repeatedly warned humans: If humans do not change their current behavior, it is very likely that within a few hundred years the earth will no longer be suitable for human habitation, and alien planets must be immigrated. Out of his sense of responsibility, he worries that if alien intelligent life forms, like our current human beings, have not undergone profound transformation and grown into noble new humans (new life forms) and behave in narrow and selfish ways, then they will They invade us and harm us for their own benefit.

Hawking’s death will be remembered by future generations. We are being cautious not to contact any aliens. Just afraid of harming humans. Hawking's warning demonstrates the cautious virtue of a scientist with Virgo tendencies. Contact with aliens is like putting flour on wet hands, it is difficult to get rid of it. No one needs to warn us that we and all possible extraterrestrial civilizations will have no contact with each other until we grow old and die. But "hearing the sound of chickens and dogs" can almost be achieved. For example, radio communication can realize contact between different interstellar civilizations, but there is an insurmountable long distance gap in physical contact and communication. According to current knowledge, life can only spread between star systems by attaching nucleic acid macromolecules to asteroid rock fragments. This phenomenon is nothing more than the dissemination of basic information about life, and is far from being considered an interaction at the civilization level.