Can we travel back in time.? Does the existing theory put a constraint on it or

Jump to Last Post 1-5 of 5 discussions (5 posts)
  1. Utkarsh raj profile image70
    Utkarsh rajposted 7 years ago

    Can we travel back in time.? Does the existing theory put a constraint on it or says it is possible!

  2. melpor profile image93
    melporposted 7 years ago

    According to the laws of nature we cannot travel back in time even if we had the capability to time travel. Every event in the universe has a cause before an effect. The event must have a cause before you can see the effect of the event. 
    For example the Sun produces heat (the effect) because of the thermonuclear reactions of the hydrogen atoms occurring in its interior (the cause).

    This what the "Grandfather paradox" of time travel is all about. You cannot go back in time and kill your grandfather to stop yourself from being born. The paradox here is if you were never born you will not be able to go back in time to do this act because you will not exist to do the act.  You being born is the cause of the event to go back in time to kill your grandfather. That is the effect of the event. It cannot be done in reverse.

    It doesn't make sense , the the effect of you killing your grandfather cannot happen before you were born to cause this effect. That is the universal law of the universe, every event has a cause before an effect of the event can be detected.

  3. Jonesy0311 profile image60
    Jonesy0311posted 7 years ago

    Physicists have long since proven that effects can be observed before their causes. This is most notable in the case of tachyon (faster than light) particles which perpetually travel backward in time. Time is not a unidirectional ever-flowing stream. Rather, every possible history exists simoltaneously, each with its own probability. If you are interested in researching further, you should start with "Time Warps" by John Gribbin. Stephen Hawking covers most of the basics in layman terms in "A Brief History of Time," "The Universe in a Nutshell," and "The Grand Design."

    The "paradoxes" such as mentioned by melpor are irrelevant and any physicist can explain to you that time travel is not only possible, but can be achieved several different ways; theoretically. We just don't have the technology yet. There are no physical laws whatsoever that preclude the possibility of time travel or inter-dimensional travel in any direction.

  4. fatfist profile image80
    fatfistposted 7 years ago

    I once tried to travel on time.
    I tried to go forward and it didn't work.
    I tried to go backward and it didn't work.
    As it turns out, I was not SEATED on time so I couldn't travel on 'it'.
    Time has no edges or boundaries I could grasp and go for the ride.
    It just turned out to be all in my head.....

  5. brutishspoon profile image63
    brutishspoonposted 4 years ago

    Time travel is not possible within our understanding of how the world works.

    To make Time travel possible we would need to rewrite relativity to create a timeless universe.


This website uses cookies

As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

Show Details
HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
LoginThis is necessary to sign in to the HubPages Service.
Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
AkismetThis is used to detect comment spam. (Privacy Policy)
HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
MavenThis supports the Maven widget and search functionality. (Privacy Policy)
Google AdSenseThis is an ad network. (Privacy Policy)
Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
Index ExchangeThis is an ad network. (Privacy Policy)
SovrnThis is an ad network. (Privacy Policy)
Facebook AdsThis is an ad network. (Privacy Policy)
Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
AppNexusThis is an ad network. (Privacy Policy)
OpenxThis is an ad network. (Privacy Policy)
Rubicon ProjectThis is an ad network. (Privacy Policy)
TripleLiftThis is an ad network. (Privacy Policy)
Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)