Can human invent time machine device or cold fusion?
480487
Both time travel/time machine and cold fusion have theory, scientific theory on how it can be done and accomplish.\n\nBut to bring a scientific theory into practical application, it will take years of experiment, and trial-and-error experimentation. \n\nSometimes coming up with a practical application can take decades or centuries due to limited technology.\n\nIn example, Black Hole, it was an old theory that Black Hole exist, but only in the last 10 years when scientific observation and space exploration confirm black hole do exist, among the technology use is the Hubble telescope, which were unavailbale quarter of centuries ago.\n\nOn the fusion side, its harder to create fusion than fision. The energy requires and the scale or scope of the work. But maybe sometimes in the future, someone might stumble into a way to create a tabletop fusion.
502465
There is no such thing as time travel, it's a physical impossibility. The reason we haven't had any visitors from the future is because time travel simply cannot occur.
303837
Time travel is possible when we travel forward not backward. IF you look to the history books there are no such thing of human come form the future. So that is the proof that has defined the theory that we can't go to the past. There are theory that we can move forward by using the method of speed. Once you increase the speed of travelling the time will change very fast, and you might be in the future. But to have that kind of machine to bring you forward needs a lot of discovery especially about the strenght of metal, fuel, speed, and a lots more. You can get the theory about speed from einstein. Whatever you want to know about it, you can get it there, BUT eventhough you learn about time travel, you won't get that technology while you still alive. Maybe you can use that information just for you knowledge. Not more than that.
1156662
No we cannot. The time travel stories are our over enthusiastic mind's work. It just cannot be possible. Unless we attain speed of light. Do u believe in relativity? think about it... maybe u will find answers there.
56785
Yes, time travel is possible. :)\n\nIf you put a person in a rocket that can accelerate up to near light speeds on a round-about trip, when this guy comes back, he'd have aged much lesser than the guys who sent him. So he has travelled forwards in time.\n\nTravelling back in time is also possible. Oscilatting in time is possible. Time statis is also possible. All if we imagine a universe that has only a few elementary particles.\n\nHow? Well imagine a universe that has only a pendulum that swings back and forth. Now, we, as observers of this pendulum, can make the following observations, all different, and all "correct"\na. The pendulum is swinging back and forth as time advances\nb. The pendulum swings forth, then the direction of time reverses, and the pendulum goes back in time and swings back\nc. The pendulum is swinging forth and back as time retreats\n\nWhich of these is correct? We can't answer that question. So we can choose any one - it doesn't matter. These three are just different ways of looking at the phenomenon.\n\nYou may also want to read up about Feynman's diagrams
1032044
I know someone in this research area. Info can be found at...\n\nhttp://www.fusionpower.org/\n\nI'd like to say that within 100 years some kind of clean(er) energy will be produced at the atomic level.\n\nBut the hurdles associated with Fusion, really do seem insurmountable at this time.
680669
we r travelling at 1 second forward per second.\n\nIf that's not that u meant, the easiest and most likely way to get a time machine to time travel is for yourself in the future to travel back now to give yourself the time machine now which u got in the "past" from the "future yourself" coming back to gave it to u.
46433
Nope....if it were possible in the future, someone would have come back by now, and brought the technology with him.  hasn't happened yet, so it's a no-go
621638
Four things I'm waiting for, and hope to see in my lifetime:\n\nAn inexpensively-made material that is superconducting at "normal" temperatures.\n\nPractical fusion power. (Though that would probably follow naturally from the first one.)\n\nSome cheap way to break down any substance into its elemental components.  Everything would then be recyclable.\n\nCheap manufacturing of carbon nanomaterials such as hyperfilament, "Bucky tubes" and the like.\n\nIf you can get any of these ideas to work, you're welcome to steal them.\n\n-- Oh, and an anti-microwave; something that freezes as fast as a microwave cooks.
16464
Is it possible currently? Well, no.\n\nIs it theoretically possible? Maybe.\n\nThere is currently no known way for transmitting a collection of particular molecules from one place to another, even theoretically. It could be that we will discover this to be possible in the future, or it may be that this really is impossible, and can never be accomplished. This is still an open question, scientifically.\n\nOn the other hand, it *is* theoretically possible to scan a collection of molecules, find out all the information necessary to exactly reproduce them, pass that information to another location, and produce an exact replica. No technology currently exists to do this, but it is possible that such a technology will exist in the future.\n\nIs this really teleportation? Arguably not. But it may be the closest we ever come.
1061597
That is a scary thought, just one wrong person or even one wrong move and the world could be thrown into a parallel time or alternate universe, but would someone with a time machine be able to fix what went wrong. Then I think of what good even I could or what  I would want to go back and "fix" warn myself or loved ones of mistakes, prevent some deaths, but I know that this is not my place and I would not want to "play" God, Greed would probably play into it and I would want to play the lottery or something equally greedy. Great Question!!! Thanks for getting me to think about this.
248955
I don't think it is possible, and if so the experiment itself would probably detroy the fabric of our reality to the point that people's answers would disappear, and reappear as different answers. The time machine does make for some fine fiction, though.
77567
Cold fusion has not been achieved.  Someone is pulling your leg about that.  "Hot" fusion reactions have been achieved in the lab, but only under very limited circumstances, not sustainable, and not at the break-even point in terms of energy production.
609407
Well i don't think it is possible....but if it is created it will be great...but the cost will be very high...many unsolved mysteries would be solved...hope someone invents it.. ;)
516219
Yes, Since the Star Trek show and The movies like the fly,\nI believe it is very possible that a machine can make people\nDisappear and Reappear. Maybe others will know eventually.
881241
Nope.  You'd have to INVENT the thing, and nobody would use it.  \n\nBut PRINT out the thing, then SCAN that into your computer. \n\nGood luck and Happy Computing!
114656
It's not necessarily impossible according to theory, but given our current technology, it's out of the question.  There's a lot of trouble with time travel theory, including multiple paradoxes.\n\nThe most famous paradox is, of course, the grandfather paradox.  It goes something like this: One day, after you've built your time machine, you decide to travel back into the past to shoot your grandfather before your father is born.  Here is the major paradox, if you suceed in killing your grandfather, you couldn't be born to go back and shoot him.  Just as well, the conditions required for you to shoot him couldn't exist and thus he lives.\n\nStill on the 'travel back in time to shoot grandpa' string, several other things could happen as well.  You could be transported to an alternate timeline, similar to ours, but not ours, and whatever you do there doesn't affect anything in our time line.  You could go back and try and kill your grandfather, but you are thwarted in every attempt, which tends to imply some sort of destiny or grand scheme.  You could try to go back in time but are ripped to shreds because every fragment of your being wants to be in its natural time.  There's a million and one other things that could happen.\n\nThat, I believe, is not necessarily answering your question, though.  Time itself is not understood by physicists even now.  What it is, no one is quite sure!  (However, I'm fairly certain time is related somehow to mass.)  One thing that's always for certain is time moves forward in a very linear fashion, cause followed by effect otherwise called casaulity.  I can't say one way or another why exactly we can't go back in time and I won't say it's not possible, some theories say it is.\n\nHowever, I believe Stephen Hawking offered up the best proof against time travel to date: Wouldn't there be time tourists from the future visiting us if time travel was feasible?