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The first page of The Time Machine published by Heinemann. Time travel is the hypothetical activity of traveling into the past or future. Time travel is a widely recognized concept in philosophy and fiction, particularly science fiction. In fiction, time travel is typically achieved through the use of a hypothetical device known as a time machine.
Quantum mechanics requires physicists to solve equations describing how probabilities behave along closed timelike curves (CTCs), theoretical loops in spacetime that might make it possible to travel through time. [1][2][3][4] In the 1980s, Igor Novikov proposed the self-consistency principle. [5] According to this principle, any changes made by ...
A cascade effect is an inevitable and sometimes unforeseen chain of events due to an act affecting a system. [1] If there is a possibility that the cascade effect will have a negative impact on the system, it is possible to analyze the effects with a consequence / impact analysis. Cascade effects are commonly visualised in tree structures, also ...
A temporal paradox, time paradox, or time travel paradox, is a paradox, an apparent contradiction, or logical contradiction associated with the idea of time travel or other foreknowledge of the future. While the notion of time travel to the future complies with the current understanding of physics via relativistic time dilation, temporal ...
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General relativity, also known as the general theory of relativity, and as Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics. General relativity generalizes special relativity and refines Newton's law of universal gravitation ...
Time travel is a common theme in fiction, mainly since the late 19th century, and has been depicted in a variety of media, such as literature, television, film, and advertisements. [1][2] The concept of time travel by mechanical means was popularized in H. G. Wells ' 1895 story, The Time Machine. [3][4] In general, time travel stories focus on ...
Time–space compression (also known as space–time compression and time–space distanciation) is an idea referring to the altering of the qualities of space–time and the relationship between space and time that is a consequence of the expansion of capital. It is rooted in Karl Marx 's notion of the "annihilation of space by time ...