If aliens exist, why did they not invade our earth?
Although our current human technological level is not enough to reach the level of interstellar travel , it does not mean that alien civilizations cannot reach our earth.
Human beings are simply too small to the universe.
We don’t know what this universe means at all. Just as the viruses in our bodies cannot sense us humans, we also cannot sense the meaning of this universe.
In the universe, the most terrifying thing is actually not that we humans are small, nor that the entire universe is so beautiful, but that in such a vast universe, there is only one intelligent life system like our earth.
We humans wander alone in the universe, and have discovered nothing after exploring the alien civilizations that have been in history for nearly a hundred years.
Review of dinosaurs that once ruled the earth for about 200 million years.
Through 200 million years of evolution, none of them have evolved into a complete set of intelligent brains.
If our human ancestors did not start walking on the ground then it is very likely that we are still just animals living on trees now.
Although we humans now have a certain ability to explore the universe, our human science and technology have only developed exponentially in the form of an exponential explosion in the past century.
It seems that humans thousands of years ago did not make any substantial contributions in technology.
What does this mean?
Why is the only one of the humans on Earth, the species, evolved out of wisdom?
So from the perspective of the entire universe, it is simply a coincidence that the earth can give birth to a wise civilization like our humans.
The probability of a coincidental event happening is like disassembling all the parts of an mechanical watch , throwing them into the river, and reassembling it with the power of the water flow.
so the probability is so small that it is almost impossible.
Suitable atmosphere, suitable oxygen , suitable lighting conditions.
has large-scale planets such as Saturn and Jupiter , which block the impact of asteroids in the universe.
There is the moon constantly surrounding our earth, controlling our earth's stable rotation for 24 hours.
Earth has a magnetic field to protect the atmosphere, thereby protecting the radiation of solar wind .
All kinds of coincidence conditions seem to us never be able to list them one by one.
So from the perspective of such a low-probability event, let’s speculate that there are aliens in the universe, and there are also aliens on other planets in the universe.
But there is a high probability that they are just like dinosaurs, only knowing how to maintain life and have not evolved a smart system.
They do not know how to use electromagnetic waves to send signals to the universe, they do not know about aerospace technology, nor do they know how to explore the universe.
So it is conceivable, how can such a civilization contact us earthlings?
