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Time Travel: Theories, Paradoxes & Possibilities

Wormholes And Blackholes

Wormholes are points in Space-Time in which the two different points are connected, allowing instant transportation of matter.

Blackholes too can be a possibility for time travel, according to another famous physicist, Stephan Hawking, who envisioned circling around them in the opposite direction.

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Time Travel: Theories, Paradoxes & Possibilities

Time Travel: Theories, Paradoxes & Possibilities

https://www.space.com/21675-time-travel.html

space.com

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Key Ideas

Time Travel

The Science Fiction’s holy grail, Time Travel has been a popular topic in various books, movies and TV series for decades.

Time Travel is the ability to ‘travel’ between two different points of time, mostly involving a vehicle of some sort, which is able to arrive in the past or future.

Understanding Time

According to physicist Albert Einstein, time is not a constant phenomenon as it appears, but is an illusion, and can vary from different vantage points.

Space is three-dimensional, and Time, according to the famous physicist, is the fourth dimension. It also speeds up or slows down, so is actually subjective, as stated in his Theory Of Special Relativity.

Space-Time

Einstein's theory of general relativity says that Time can be bent, stretched and squeezed, and the four-dimensional fabric with a huge mass creates a dimple, or bending of Space-Time, causing gravity.

This effect of time dilation is proven using GPS satellite technology in space, making astronauts not only travel space but in a slightly different time than the earthlings.

Light Speed

The Theory of general relativity suggests that if an object is faster than the speed of light, which is 299,792 km per second, and in a vacuum(no air). This also would mean that such objects would have an infinite mass and a zero-length, which is not possible.

Wormholes And Blackholes

Wormholes are points in Space-Time in which the two different points are connected, allowing instant transportation of matter.

Blackholes too can be a possibility for time travel, according to another famous physicist, Stephan Hawking, who envisioned circling around them in the opposite direction.

Theories Of Time Travel

  • Infinite Cylinder: Also known as Tipler Cylinder is a hypothetical theory of a cylinder capable of handling matter that is 10 times the mass of the sun and rolling it inside.
  • Cosmic Strings: Is a theory for potential time travel is to make use of the narrow tubes of energy found in the universe, which is believed to be leftover ‘strings’ from the early cosmos, stretching infinitely.

Time Machine

Various fictional and semi-fictional methods are discussed in order to build a time machine. It is supposed to have ‘antimatter’, ‘negative-energy density’ and other exotic technology in order to work.

New research in Time-Travel suggests it is possible using focused gravitational fields in a doughnut-shaped hole.

The Grandfather Paradox

Time Travel, in pop culture and theory, presents many unique situations and paradoxes, the most famous of them being the Grandfather Paradox, which is dealt with in the Terminator movies, along with Back To The Future.

The paradox states that if you travel back to the past and kill your grandfather, then you cannot be born in the first place, at least in that timeline. Some scientists have alternate theories involving a parallel universe to answer this.

Culture And the Future

Time Travel has been popularized in movies like Interstellar, episodes of Doctor Who, Back To The Future, and even the first Superman movie made in the 70s.

Time Travel is an engaging concept, which has plenty of questions, which the scientists are working on. New developments in quantum theories and particle study may provide answers to the various paradoxes.

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Insights of Albert Einstein
Insights of Albert Einstein

Many insights of Albert Einstein are now part of popular imagination: black holes, time warps, and wormholes show up in movies and books.

Less famous, but probably the most revolutionary pa...

Some changes don't change anything

The most fundamental aspects of nature stay the same.

For example, Einstein's papers on relativity show that the relationship between energy and mass is invariant, even though energy and mass can take on many different forms.

Even though matter produces energy, the energy-matter content of the universe never changes. Matter and energy are less fundamental than the underlying relationship between them.

Relationships over things

We often think of things as the heart of reality. But most often the relationship is more important, not the stuff.

We may think "stuff" like space and time are unchangeable aspects of nature. In reality, the relationship between space and time stays the same.

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Time

Time is difficult to explain. When looking for a dictionary explanation, time is described as "the general term for the experience of duration." But what is duration?

We have contra...

The idea of time travel

The idea of time travel is a very recent idea that starts with H.G. Wells's 1895 novel, The Time Machine. After that, we find the concept in American science fiction, or in modernist literature - each twisting time in new ways, to explore the unpredictability of memory.

Stephen Hawking also played with the idea of time travel. He proposed the idea that it can't happen because it didn't happen.

Our perception of time

The internet changed our perception of time: We're looking at the past on our video screens, and it's just as clear as something in the present, making it feel like an unending present.

Time travel is also a powerful way to imagine what the future might bring. Time travel allows us to explore the consequences of our worst tendencies.

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Tips To Prepare For Vacations
  • Give yourself enough time to complete the work you have committed to before you leave and don’t take on new projects.
  • Delegate important tasks to someone capable a...
Tips For During Your Vacation
  • Scan your email occasionally to reassure yourself that nothing catastrophic is happening in your absence.
  • Try some activities, maybe something new, so you can have so much fun you forget all work related stress.
  • Turn off your phone and email notifications so you’re not constantly reminded of work. 
  • Don’t be tempted to work. You are taking a vacation to get a break. Working during the break will add stress to your trip and resentment when you return.
Tips For Your Return From Vacation
  • Get to your inbox first as it will allow you to prioritize your tasks properly.
  • Try to keep away from the office or commitments at least for your first day so you will be able to focus on catching up.
  • Try to incorporate the stress relieving tactics you found during your vacation to your routine.
  • Don’t work late. As tempting as it may be, work your normal hours when you return.
The Emotions Matter

We become stressful or anxious while packing for a trip, due to us going out of our comfort zone, or in front of uncomfortable and different people.

Our previous good (or bad) travel experien...

Wheely is Not Speedy

Wheeled luggage is generally seen as a convenience, but is, in fact, a constraint, as once a heavy and large suitcase is with you, you are bound to 'wheel' it around everywhere, cutting down your travel options.

Be a Light Packer

Light packing relaxes you and facilitates spontaneous travel, a minimalistic packing done in a backpack or a shoulder bag works best.

Chronic overpacking, while it seems logical as people can need so many things, is a hassle for travel, as there is so much to worry about and carry along.

Too much baggage leads to a baggage-heavy mindset.

Gravity And The Forces Of Nature
Gravity And The Forces Of Nature

According to physicists, quantum particles are responsible for three forces of nature:

  • Strong nuclear force.
  • Weak nuclear force.
  • Electromagnetic force.
From Curves To Strings

The ‘curves in space’ theory of gravity is falling out of favour due to the fact that Einstein’s equations seem to work on our solar system but begin to break when we apply the same near a black hole or back in time, during the initial big bang.

String Theory, which conceptualizes that gravity and all other forces are products of tiny vibrating strings, is the prime candidate to replace Einstein’s work.

General Relativity Theory

Einstein's General Theory Of Relativity provides a rock-solid description of gravity, black holes and even the Big Bang, but fails to explain the very ‘singularities’ that signal towards infinity.

The extraordinary force of gravity can be researched with new-age engineering experiments but there is a risk of pushing too far and risking extreme damage by accidentally creating a black hole.

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The perception of time

Although some physicists would argue against the existence of time, we all do have a perception of time that reflects the reality of our lives on Earth.

False pasts

Most of us forget more than we remember. We change memories to make sense of what has happened in our lives. When we then recall a memory, we reconstruct the events in our minds and even shape them to fit in with any new information.

Understand the future

Many of us think of our past as a kind of a video library where we can look at records of our lives. If memories were fixed like videotapes, you would find it difficult to imagine a new situation.

It is our past memories that help us imagine a future, and to preview future events. This skill of using the past to predict the future helps us try out different hypothetical scenarios before we commit.

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Travelling is your best teacher
Contrary to popular belief, traveling can teach you more than a classroom, job, or relationship ever will.

The real world means packing up and leaving your comfort zone, the familiar, your sa...

Lessons that travelling will teach you
  1. To be more patient when things do not go as planned - and it happens on every trip. 
  2. To leave your comfort zone. It's exhilarating to forget what's familiar for a bit and expand your horizons.
  3. To be more curious. Being in new territory will probe new ideas and curiosities.
  4. To appreciate other cultures. 
  5. To live simply. You can survive with very, very little.
  6. To make friends with strangers as travelling make you desperate for human interaction.
  7. ...but to also embrace your solo travel experience.  You will come home with a new sense of independence.
  8. To try new things as what you do at home doesn't always work when you travel.
  9. To think creatively. Sometimes it takes a little thinking outside of the box to get by.

  10. To find beauty in small things that you did not notice before you started your trip, like a home-cooked meal.

Thrilling and intimidating

One of the most intimidating things when traveling is making friends and connecting with locals.

But this one hard part about adventuring alone is also the most rewarding.

Ask Questions

The more curious you are, the more people you'll meet. Mostly this involves asking a lot of questions.

Try it. The worst that could happen - someone doesn’t reply and stares at you.

Follow the Fun

When you get to a new place, ask yourself: "If I lived here, where would I go?" Look for cool events, gigs, and shows. 

It’s a great way to get away from all the tourist spots and into the cool neighborhoods where the locals actually hang out.

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Bigger Isn’t Better

The Travel and Tourism industry always thrived on big. Big cruise ships, crowded national parks, and large scale corporatization.

The trillion dollar bailouts and stimulus packages should b...

The World Becomes Non-Essential

As we fall back to the ‘essential’ living conditions, locked down at our homes, the excesses of our globalized world, the giant amusement parks, malls, hotels, airlines, resorts, and the hoards of travellers are visible.

We have to look towards a more sustainable future of travel, and not screw up this time.