The universe is "locked"

After 5 million years of baptism, mankind finally broke the shackles and successfully landed in space in the last century, with the capital to explore the universe.

Before mankind came out of the Earth, it was thought that outside the Earth might be a "world", and other extraterrestrial life could be seen everywhere. But it is not what you want, when the astronaut Yuri Gagarin came to the universe by a rocket but found that space is too quiet, a glance at the black, only a huge space to support the light of the entire solar system, in addition to the Earth is not a bit of life.

In the next few decades of exploration, people also gradually understand the universe, only to find out how small Earth, is and that the universe may be more than one intelligent life of human beings. In a solar system with a diameter of one light year, there are three Earth-like planets, and the entire universe is guaranteed to be 93 billion light years across, with countless planets and stars in existence. Therefore, in the 1950s, the famous physicist Enrico Fermi asked a ponderous question: Where are they?

According to the reasoning and probability analysis, the universe should not be only one kind of human intelligent life ah, just the territory of the galaxy, there may be thousands of alien civilizations, then why we can not find them?

Extraterrestrial civilizations may exist

The famous physicist Stephen Hawking believes that the existence of extraterrestrial civilizations is inevitable, but humans are not yet able to find them. In addition, many scientists have said that the possibility of alien civilizations not existing is almost 0, implying that humans are not alone in the universe.

So, if extraterrestrial civilizations exist, then wouldn't there be many civilizations stronger than humans, so why don't they come and invade Earth?

For this doubt, Hawking believes that there may be boundaries between the universe, and we are located within the boundaries of only Earth civilization, can not break out, and will not find other civilizations.

In other words, humans may not even fly out of the solar system at the moment, this solar system of just one light year would require humans to keep flying for tens of thousands of years, and this is still the ideal state when it comes to the edge of the solar system, maybe some kind of obstacle, can not pass through, then humans will be trapped in the solar system for a long time.

Nowadays, the universe is expanding outward every moment, and the universe that humans see is only the observable universe, but no one knows how big the actual universe is.

In other words, the universe is too big and civilizations are far away from each other, so even if there are alien beings of higher civilization level than ours, they will not pay such a big price to invade us, while more advanced civilizations do not bother to invade us, which is meaningless.

To use an analogy, even if we know that there are other intelligent civilizations within the nearest Proxima galaxy to us, we want to go to them, but also have the will to do so, and the vast majority of people hold the idea of living together in peace, the word aggression pales in comparison.

In addition, according to M theory, the universe may be a multiplicity of space, in our perception the universe is very large, but the universe may be divided into countless small universes.

Each small universe can not communicate with each other, if you want to cross from this small universe to another small universe, the technology required is very high, and even if you reach this level may become a stellar-level civilization or more, to which time human civilization scattered in various planets, the Earth is no longer the only home, the use of energy is also diversified.

If it comes to this point, the universe of resources arbitrarily adopted, while inexhaustible, then what is the point of invasion? It's just a barbarian tactic.

Conclusion

The universe is a diverse world, and human beings are primitive animals that evolved, nature with a primitive atmosphere, and fighting, inevitably will produce some strife. But we can't look at alien civilizations with our own eyes, maybe they are naturally peace-loving and have no sense of fighting, not to mention that the development of civilization is not only the development of technology, but also the result of the evolution of life.

Therefore, we do not need to worry about the invasion of alien civilizations, down-to-earth development of their own is the priority task at present.