Who has not dreamed of visiting ancient Rome, seeing a living dinosaur or
prevent them past me to make a mistake they have paid all their lives? Whether for sightseeing or to repair errors, the concept of time travel is an interesting idea. Unfortunately, well that fiction offers many examples of travelers who embarked in the past to break bread with Jesus or to assassinate Hitler, the laws of science and logic as currently return trips patio the temporal realm of fantasy. In addition to requiring technologies that defy physics as we know it, the time travel could be a potential source of paradoxes violating the laws of causality, according to which the causes must occur before the effects. Here are some solutions that you can consider when you are looking to return to the past.
Go faster than light. When traveling at speeds close to that of light, time slowed down for you compared to the outside world. If you can travel faster than light, time dilation would theoretically allow you to reach your destination even before the party, bringing you actually so in the past. Unfortunately, the speed of light is the ultimate barrier of the universe. According to the laws of the relativity of Einstein, it takes an infinite amount of energy to move an object to a lower speed than the light at the speed of light; the faster you go, the more you become massive and you will have the energy to accelerate again. Travel faster than light would require a level of technology we do not yet have and that's probably impossible.
Relativity theory allows particles called tachyons to travel faster than light, but there is no evidence that tachyons exist or can be used to convey meaningful information (like you) if it was the case.
Dive into a wormhole. Theoretically, a wormhole is a distortion of the reality that connects two points in space-time with a shorter distance than that which separates the linear reality. Wormholes could connect distant galaxies, parallel universes, and even different eras. However, as for travel at a speed greater than that of light, the practical conditions for the creation of a stable wormhole and conducive to make this unworkable option.
Theories of quantum mechanics suggest that our universe is full of tiny wormholes, smaller than atoms, which form and collapse on a small amount of time, the level of reality of quantum foam. Create one and increase to make him achieve scale for humans to cross it could still cause a feedback loop that would collapse the wormhole even before it can be used for time travel.
Go ahead and let the future decide. If you really must absolutely return to the past, but you have not found a solution to solve the practical problems of the journey at a speed greater than light or the formation of wormholes, you can travel forward in time, in the distant future, beyond your life expectancy. Maybe in the future, humans have developed technologies that make time travel possible in the past and you can convince them to send you back to your historical destination. According to the laws of physics, traveling in the future are more feasible than traveling into the past.
Take a trip to a speed close to the speed of light. Special relativity predicts that if traveling near the speed of light, time slows for you compared to slower frameworks. So if you spend a few years away from Earth and that you return on your return, you will realize a greater number of years have passed on Earth for you.
Freeze you in a state of biostasis (or suspended animation). Although this technology is barely developed, it may be possible to freeze a human body and thaw the many years later, without having changed nor aged. If you manage to make you a time capsule of this kind, you could survive well beyond your life expectancy and wake up in another time, in the distant future.
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