So in light of Singularity, I've put together a poll on time travel with an extensive range of opinions about whether we should research and use time travel. Personally I think its too dangerous to even consider at all, but I'm not going to stop scientists doing their research into black holes since there's plenty of other reasons they could be doing that. I'm voting for E/2.

Time Travel could only be used for evil.

This is a bad topic, you should go back in time and unmake it :o
 
Also, you did not vote E; I voted E and I was the only one voting for it so far =/

" This is a bad topic, you should go back in time and unmake it :o  Also, you did not vote E; I voted E and I was the only one voting for it so far =/ "

Don't mess with time, always a bad idea
Either it ends up screwing up the future or causes the future to be how it is

Nothing good would come from time travel.

Wouldn't this question be better asked at a time when we actually canuse it? If we were able to develop a means of travelling through time, I doubt it would even be attempted if it was deemed too dangerous. Regardless of whether or not we ever will, I think it should be researched for the purposes of learning about time and space, and to better understand the universe and the forces it contains.

" Nothing good would come from time travel. "

" Don't mess with time, always a bad idea Either it ends up screwing up the future or causes the future to be how it is "

" Wouldn't this question be better asked at a time when we actually canuse it? If we were able to develop a means of travelling through time, I doubt it would even be attempted if it was deemed too dangerous. Regardless of whether or not we ever will, I think it should be researched for the purposes of learning about time and space, and to better understand the universe and the forces it contains. "

@Tennmuerti said:

"there are still huge technical issues to solve first before we even get to the stage of asking: "Is it OK to clone a human?"

If you don't mind me quoting myself:
 

The only way we can solve these challenges is to start working on the problem now. When movies like I Robot show us a far flung future in which robots are helping people in all aspects of their lives, many people forget than in many respects this is already happening - its just that robots don't take human form and are not able to emulate the full range of functions like humans quite yet. If we don't work these things out soon, one day we might just find ourselves with a cloned human being without any legal, moral or ethical frameworks sorted out. That scenario would be a real mess.

You do realize that it is 100% IMPOSSIBLE to travel back in time, right? The only way time travel is possible at all is moving at the speed of light, and that could only bring you forward as that is the only direction the universe moves in (backwards is a human concept). The only way you could conceivably attempt it is if you found a wormhole that connected two different points of space time. Even then, you'd have to figure out a way to go through it.

Each time you change the past you create a separate timeline, thus bringing a multiverse into effect. 
That would lead to Superboy punching walls, and we all know how that goes.

i think its impossible