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re: Time travel
Posted on 2/19/15 at 9:42 am to scrooster
Posted on 2/19/15 at 9:42 am to scrooster
quote:
We'll probably discover teleportation first because it is key to time travel ...
Here's a question for the readers of this thread regarding teleportation: When the copy of the person is assembled at the desired site, is he the same person consciously that was disassembled? I don't think so.
The "classic" idea of teleportation, from Star Trek for example, requires that the object or person be disassembled and read by the teleporter. The object or person is destroyed in the process.
I would never teleport, when it's invented, for this reason.
This post was edited on 2/19/15 at 10:16 am
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Posted on 2/19/15 at 10:10 am to OleRockyTop
quote:
Looper
My first thought. Crazy flick.
Posted on 2/19/15 at 10:20 am to 5thTiger
quote:That isn't true. The HeLa cells were taken during her diagnosis/treatment. She was still treated, but cervical cancer detection and treatment weren't nearly as good as they currently are and she already had metastatic disease.
Effectively they let her die for research.
The big ethical debate is over using her cells for research when she and her family were never asked for permission to do so.
This post was edited on 2/19/15 at 10:22 am
Posted on 2/19/15 at 10:27 am to DocHoliday11
quote:
Okay so let's say time travel was just discovered two Minutes ago.. They decide to go back in time and not let 9/11 happen. How would that affect our current memories of it and how would they be replaced by "what would have happened" in that time frame until now.. There's just too many questions ha. That's why I said I think if we ever got close God would come back
Depends on whether one prescribes to universe or multiverse theory. In universe theory, this opens the doors to all kinds of chaos, but in multiverse theory, all that changes is that an alternate universe is created, but the universe the time travelers came from remains the same (on account that those events would have to occur in order for those time travelers to be motivated to travel through time in order to prevent it in the 1st place).
Posted on 2/19/15 at 10:50 am to kingbob
The idea of time being a tangible thing that can be manipulated is more science fiction than actual science. Time is a way to record things, nothing more, completely intangible, so no, time travel is not possible. That bit in Interstellar where time slowed down on different planets is total garbage. Made for a great movie, though.
This post was edited on 2/19/15 at 10:51 am
Posted on 2/19/15 at 11:32 am to RedPants
quote:
The idea of time being a tangible thing that can be manipulated is more science fiction than actual science. Time is a way to record things, nothing more, completely intangible, so no, time travel is not possible. That bit in Interstellar where time slowed down on different planets is total garbage. Made for a great movie, though.
Well, Einstein showed that time is relative. He also said that time and space are inseparable, so we really have to regard spacetime as a tangible part of the universe.
Yes, we use time as a measure of change, but it's actually spacetime that's changing. For this reason travel into the future is indeed possible relative to two or more bodies traveling at different velocities.
A person traveling around the earth at great speeds experiences the passage of time at a slower rate than another person on the ground. This has been proven empirically by space missions.
Posted on 2/19/15 at 11:36 am to Kentucker
quote:
Well, Einstein showed that time is relative. He also said that time and space are inseparable, so we really have to regard spacetime as a tangible part of the universe.
He theorized it, but never proved it. People ever since have grabbed onto that theory for it's cool factor.
Posted on 2/19/15 at 11:42 am to RedPants
It's been proven beyond doubt. One experiment put one atomic clock, the most accurate possible, on a space craft that was orbiting earth and its calibrated twin stayed on earth. After the mission the clocks read different times, showing that the clock on the space craft experienced a slower time.
Also, every time you use a GPS device, you're experiencing this phenomenon. GPS devices have to take into account the time difference between the satellite and the ground. Otherwise, they're of no use.
Also, every time you use a GPS device, you're experiencing this phenomenon. GPS devices have to take into account the time difference between the satellite and the ground. Otherwise, they're of no use.
Posted on 2/19/15 at 11:50 am to Kentucker
That all is also very much based on time's point of origin. Say I'm a 50 year old man, and someone else was born at the exact same moment I was, and we were in the exact same physical condition. If I were to speed around the earth in the atmosphere for 5 years and he were to stay on earth, spacetime may be moving faster for me, but our biological clocks are still ticking at the same rate because they started at the same time. When I landed back on earth, we'd still be the exact same age because our biological clocks are not based on space time. That's why I think time travel is impossible. We can't reconcile the differences between physical beings' biological clocks and the different rates of spacetime.
This post was edited on 2/19/15 at 11:51 am
Posted on 2/19/15 at 12:01 pm to RedPants
Sorry, no. First, time for you would pass more slowly than it would for your counterpart on earth because you're moving much faster relative to him. Second, your "biological clock" would be running slower because your spacetime is slower. When you returned to earth, you'd be younger than your friend.
Posted on 2/19/15 at 12:07 pm to Kentucker
I don't buy it. Point of origin plays a factor in the speed and path of anything that flows, even time.
Posted on 2/19/15 at 12:13 pm to RedPants
I can only recommend that you familiarize yourself with Einstein's theory of special relativity. It shows the relationship between space and time.
Posted on 2/19/15 at 12:13 pm to DocHoliday11
my first purchase.......
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