The grandfather paradox is a time travel paradox, a common theme in science fiction stories. It was first proposed by French science fiction writer René Barjavel in his 1943 novel Le Voyageur Imprudent (Le Voyageur Imprudent). The scenario is as follows:
Suppose you went back in time and killed your grandparents before your father was born, but doing so would create a paradox:
You go back in time and kill your young grandfather, and when the grandfather dies there will be no father, and there will be no you without the father, so who killed the grandfather? Or think of it as: Your existence means that your grandfather did not die because of you, so why did you kill your grandfather?
This is the grandfather paradox wide paradox. Parallel universe
Physicists think that maybe the world is made up of an infinite number of parallel universes, and when someone goes back in time and kills your grandparents, that person is actually killing someone from another universe (or this action of yours can create a new parallel universe), and the death of the person's "grandfather" or "grandmother" will only make the person in that parallel universe cease to exist, and the person in this parallel universe will be safe and sound.
In quantum physics, the theory of "multiple worlds (world line theory)" can be understood as follows: for every seemingly random event, as long as its probability is not zero, all its possible situations will be in different parallel worlds Happened, causing a branch of history. Physicist David Deutsch argues that when you go back in time and kill your grandparents, you're actually entering another world and killing people from another world. (that world differs from yours only in that your grandparents died)
M-theory, by far the most likely theory to combine 5 different string theories, explains parallel universes in this way: Multiple 3D "branes" can be simultaneously in a 4D universe (not Einstein's 3D plus 1D time; see brane cosmology); collisions between these branes would generate large amounts of energy in the branes - which could also explain how the Big Bang originated. However, M-theory does not explain the relationship between the histories of different membranes, nor is it certain that when you go back in time, you enter into another membrane.
Chaos Theory
Chaos theory is a method that combines qualitative thinking and quantitative analysis. It is used to explore the behavior of dynamic systems that cannot be explained and predicted by a single data relationship, but must be explained and predicted by a whole and continuous data relationship.
"The original state of everything is a bunch of seemingly unrelated fragments, but after this chaotic state ends, these inorganic fragments will organically merge into a whole"
The word chaos originally referred to the chaotic state before the universe was formed. Ancient Greek philosophers held chaos theory for the origin of the universe, claiming that the universe gradually formed the orderly world from the beginning of chaos. In an orderly universe, Western natural scientists have discovered many laws in nature one by one after long-term discussions, such as the well-known gravity, lever principle, relativity and so on. These natural laws can be described by a single mathematical formula, and the behavior of objects can be accurately predicted according to this formula.
For nearly half a century, scientists have discovered that many natural phenomena can be transformed into simple mathematical formulas, but their behavior cannot be predicted. For example, meteorologist Edward Lorenz discovered that a simple thermal convection phenomenon can actually cause unimaginable weather changes, resulting in the so-called "butterfly effect". In the 1960s, American mathematician Stephen Smale found that the behavior of certain objects passes through certain regularities. After the change, the subsequent development has no certain trajectory to follow, showing a disordered state of chaos.
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