Time travel, definition and study. A-Z index of Cognitio.

Time travel is the concept of travel between different epochs or temporal moments, understood in a way similar to the journey between different points of the space. It can be done both in the past and to the future, without the subject necessarily experiencing the entire time interval between the time of departure and arrival. However, with the current knowledge, this machine should also have huge spatial and temporal jumps as Earth on Earth occupies, second by the second, a different position along the revolutionary orbit around the Sun, as well as the Sun occupies a space well precise during his bike around the Milky Way Center, and so on.

Sun, definition and study. A-Z index of Cognitio.


In conclusion, a journey so conceived in time should necessarily be a journey into space, otherwise, the hypothetical chrononaut would find himself lost in the cosmic vacuum at the time of arrival. Classical physics has been examining for centuries and with care the possibility of traveling over time, and in particular, the difficulties arose above all for traveling in the past. This difficulty remains largely linked to the concept of “time” according to the world’s classic experience and knowledge, or a “time” often perceived only as “flow of events”. According to this view, time is, therefore, an immutable and unidirectional parameter, such as the flow of river water, and all the events of the universe follow the codes of a causal model. General relativity tells us that space-time curves when a body – or even light itself – crosses any gravitational field. Further observations, mainly performed during the solar eclipse of 1912 and 1919, revealed that even light, when crossing a mass, undergoes a curvature – and hence a variation – of the same space-time, a phenomenon subsequently baptized as the “gravitational lens”. The current paths for a hypothetical journey over time would, therefore, remain in the study of space-time holes and the analysis of black holes, always compared with the study on the Law of Energy Conservation. Various experiments carried out over the last ten years give the impression of a retrograde effect, ie a journey back in time to the past, but are interpreted differently from the scientific community. An example is the delayed choice quantum deletion experiment that let’s assume that quantum-scale a particle in the future determines its past. According to some, this simply points out the difficulty of qualifying the notion of time within the quantum scale; in any case, this experiment does not constitute a violation of causation. Relatively opposed to the hypothesis of cosmic censorship, a quantum theory is known as “theory of many worlds” was advanced. The theory hypothesizes so many copies of our world as to the possible quantum variations of the particles that compose it. The phenomenon of unidentified flying objects has never found any explanation, although it is widespread not only in contemporary but also in the past. Until now UFOs have been associated with alleged visitors from other worlds.

UFO, definition and study. A-Z index of Cognitio.


However, many wonder how the aliens have never been revealed. According to the physicists, it would be more logical to think of UFOs not as space travelers, but rather as travelers of time. In practice, men of the future have come back to document the past ages, discreetly, without interfering with the course of history. This would also explain the anthropomorphic image of the alleged aliens, widespread not only in the cinematic spheres but also in the most accredited scientific testimonies. It would be strange, not to say impossible, to think of an alien coming from stars far away thousands of light years from us, with a body similar to ours. Just think of life on Earth and variety of species to understand how the physiological model is just one of many possible. A million years ago the man was very different from today. How will it be in a million years? Much will depend on environmental conditions and climatic evolution. It is not excluded that man of the future may be similar to that in many stories. Small, dark and big eyes, big skull, pale skin and almost gray. If a man was forced to live underground to protect himself from sunlight, the plausible hypothesis that ozone would disappear from the atmosphere could evolve in that direction.

Time travel, definition and study. A-Z index of Cognitio.



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Time travel, definition and study. A-Z index of Cognitio.

Time travel