Of course, I know that time travel is still a science fiction, but I have heard that General Relativity allows this to happen, for example by means of wormholes: http://en.wikipedia.org/wiki/Wormhole#Traversable_wormholes And: http://en.wikipedia.org/wiki/Wormhole#Time_travel Now I want to know- how much time is needed for the time travel? Now it is 2014 year, and let’s assume that I have got the time machine and want to go to years 1914 and see the beginning of the First world war, so I travel back in time by 100 years. I want to know: 1) How much time is needed for the time travel by 100 years? The same 100 years? So, do I really need to spend 100 years from my life to see year 1914? But I (and nobody else in world!) will not be able to donate 100 years for this purpose. But maybe during time travel the time passes much faster? In other words to cover 100 year timespan I will have to spend much less, for example 1 year only? 2) How much time will be passed for those people who attend my departure in 1914? Let’s assume that I intend to return to the very same date where I departed from (let it be 1-st of July of 2014). It means that for those people zero amount of time will be passed between my departure and return, right? For them it will be my instant voyage. 3) The time for time traveller during the time travel will pass forward in future or backwards in past? In other words, I will become younger or older during visiting year 1914? But if I become younger, then one problem arises: let’s assume that I departed to the year of 2004 WHERE I HAVE ALREADY BEEN/LIVED, it PROBABLY means that I should/cannot know that I came from 2014 (because I knew that I wanted to travel in time in 2014 and I did not think about it in 2004 when I was younger). 4) An “ordinary” time is affected by Special and General Relativity-time is slowed down at high speeds and near high masses. What can we say about “extraordinary” time which is passing during time travel? Please Register or Log in to view the hidden image!