Time travel 5

http://www.youtube.com/watch?v=dFLzV5ziWDI

Summary :
In this video , we see an interview to worldwide famous theoretical physician Michio Kaku explaining that time travel is indeed possible , but it hasn't been proofed yet .He said  that in the future , a civilization that has mastered technology to a level that can manipulate an amount of energy equal to a black hole , could actually be able to back in time visit us .But he also explains that it is not only a travel in time , but also in other universes (or multiverses , as dr.Kaku says ) .With this he says that the problems of the paradoxes no longer exist , because when you travel back in time and change some events , they wont have an effect on the future you come from , but will create a "new" future , just like a river separates in two different directions .This is really similiar to what happens in the famous movie series "Back to the future". 

Time travel 4

http://www.dailymail.co.uk/home/moslive/article-1269288/STEPHEN-HAWKING-How-build-time-machine.html

Summary :

This article reports a part of a documentary conducted by cosmologist Stephen Hawking .Here , he discuss the methods that could be used to travel in time .He admits that years ago time travel was only considered sci-fi material , but now he truly believes that time travel could theoretically be possible.he explains how time travel could be done by using wormholes , or the CERN facility ,or even vehicles that can reach speeds close to the speed of light , though excluding all the practical problems related to these , such as the technology and the energy source .

Time travel 3

http://www.physorg.com/news63371210.html

 By following the researches of Einstein , prof.Ronald Mallett sustained that time travel could be possible within this century , if proper interest any will be invested in it .It has already been proofed that speed  affects time and space .The Professor believes in the existence of multi verses , and thus tells us that time paradox cannot occur .

Time travel 2

http://www.tomtomgpsreview.com/time-travel-impossible-mini-big-bang-hints/

Summary :

A new research has apparently showed that travelling back in time is impossible .The tiny reproduction of the Big Bang used , made with a "meta-material" , is a close copy of our universe like it was 13,7 billion years ago , as stated from the researchers .But there are some problems :this reproduction

its not exactly as our universe ,and as affirmed by some scientists external to the study , the results and the statements of their colleagues  that lead the research , cannot be applied to the real universe .