December 5, 2009 1:11pm CST
So time travel can never be possible because it would create a paradox like this example: 1. Make a time machine 2. Go back in time 3. Kill your father when he was a kid 4. Since your father died, you wont be born 5. Since you wont be born, you wont make the time machine 6. Since you didnt make the time machine, you didnt go back in time and kill your father. Now heres paradox - if you killed your father then how did you make the time machine when you don't exsist?
• United States
5 Dec 09
This is true, no matter what happens there will always be some paradox and then you can totally mess up the entire time-line. However, I don't think anyone would be stupid enough to actually kill their own father. Really, who would do such a thing? And it really is impossible to travel back in time, because right now we don't see anyone from the future coming back to our time. If no one is traveling to the past (our present), then it would mean they will never have had a time machine in the future. In the end, it really is impossible to make anything that can let us time travel, we don't have the technology. We can't even fully explore our oceans yet, and we have barely been able to go into space, so I doubt any time travel can be possible.
• United Kingdom
6 Dec 09
For you to make a time machine you would have to be born. You would have to be mature enough to make a time machine. Really making a time machine is fiction rather than reality. Nobody would be stupid enough to kill his or her own father. For example the father was born in 1920 and the son is born in 1950. If he gets to 1970 and goes back and kills his father in 1925 he wouldn't exist.