Wormholes Wormholes can be understood as time holes, also known as Einstein? Rosen bridge.
Scientists believe that wormholes are narrow tunnels that may exist in the universe and connect two different time and space. I believe everyone should know that Einstein argued in his general theory of relativity that our universe is a static, finite and unbounded curved closed body, just like a spring. If we stir the water on the water surface by hand, we will find that the water surface will form a vortex, and at the same time we can see that the water surface and the bottom will be very close. Wormhole? It is a channel that can connect two or more distant time and space through a space tunnel, and the speed of connection is fleeting.
In the universe we live in, all celestial bodies are rotating, and there is gravity between them, so there is a great possibility of a vortex of time and space. Wormholes can make two relatively distant local spaces close together instantly, so in theory, scientists all think that wormholes can provide the possibility of time travel.
Through the research of scientists, it is found that wormholes don't actually have a very powerful gravitational source like black holes, which is enough to tear everything apart. On the contrary, wormholes have no horizon. We can understand that objects entering wormholes do not have any conditions. Stephen Hawking also believes that wormholes are cracks in time and space, which may exist in every corner of our lives, but they are too small to be observed by the naked eye.
So far? Wormhole said? Is it just a hypothesis that there is no exact experiment for us humans to see? Wormhole? Yes, but you know, the essence of science is to put forward a hypothesis and then use experiments to explore whether this hypothesis exists.
Wormholes can travel through time and space, so do wormholes really exist? In fact, the topic of wormholes is also controversial in the scientific community. After all, the scientific community knows nothing about wormholes at present.
1930, when Einstein studied the gravitational field equation, he put forward a hypothesis that a wormhole is a tunnel connecting two different time and space, which can be crossed instantly. In the general theory of relativity, he also predicted that a wormhole is a door connecting two distant spaces and time. Although it is believed that wormholes can help people travel in time and space, it is a pity that so far we can't find the exact location of the wormhole entrance and scientists can't prove its existence.
Some people think that the entrance to the wormhole is probably the end of the black hole, but according to the current level of science and technology, it is extremely difficult to enter the black hole, let alone the wormhole, so many people say that it is impossible to enter the wormhole with our current ability.
Moreover, some scientists believe that wormholes are extremely unstable. If there is no negative energy substance to keep the hole open, the wormhole will suddenly close in an instant, and you may never get out when the wormhole closes!
After research, a physicist at Harvard speculated that although wormholes may really exist in theory, it will take a long time to cross them, and wormholes are not a simple way to cross them. It is better to study quantum theory than to spend time studying wormholes!
If the wormhole of time is really realized, can going back to the past change history? In Hollywood movies, there are many stories of crossing. The protagonists can travel through time and space by time machine, or even go back to the past. But do you find that people who go back to the past in film and television dramas have not changed history? Can this be achieved?
Grandfather paradox
Do we just need to talk? Grandfather paradox? , is a famous paradox for traveling through time and space. It means, if a person travels back, kills your grandfather and marries your grandmother before your mother is born, who are you?
And will the people who come back from crossing disappear at the moment they kill their grandfather? There is no clear answer to the question, but it reflects the complexity of time travel from the side.
Grandfather's paradox is completely opposite to wormhole. It thinks that when we cross the wormhole, we enter another parallel universe instead of different time and space, and what happens after you enter the parallel universe will not change what you are experiencing now.
Therefore, most scientists believe that although wormholes exist and can be crossed, they only pass through the soul and the body cannot. Only the soul can shuttle consciousness back and forth in the form of electromagnetic waves, so it will not change history at all.
Arrow of time
Einstein also proved to us with the theory of relativity that time is like a river, which can be anxious or quiet, but its flow direction will never change, and it can only flow in one direction, which is called? Arrow of time? .
The arrow of time determines that time can only flow from the past to the future, and there is no possibility of turning back. In other words, as long as the arrow head of time is shot, it will never retreat. We can only move from the past to the future, which is also the law of the universe.
The arrow of time is related to the second law of thermodynamics, which reflects the passage of time and the evolution of the universe, and the core of this theory lies in a theory called? Entropy? The concept of entropy represents the disorder or irregularity of a thing (the higher the entropy, the more chaotic it is; The lower the entropy, the more orderly it is.
This theory also explains why time keeps flowing with the increase of entropy, because everything in the universe is orderly to disorderly.
To sum up, scientists have pointed out the theoretical possibility of wormholes, but so far they have not found them, which means wormholes are still a big hypothesis. The problem of changing history can be said to be a world-class problem in human physics, which is difficult to solve, but it should be noted that once we go back to the past, we must put what we just said? Grandfather paradox? Get rid of it, or you will never go back.