Time Travel

Keeper said:
no....:erm: a black hole is simply a small piece of matter with the weight of several planets - you would simply be sucked in and die.

parallel universes do not exists, and neither do multi-verses or whatever.
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Uhm, I kinda did a mini course on time travel. It's true. Mkay. And no, black holes are much, much bigger than that. We are talking about things that are millions of time bigger than our sun. This is all backed up by scientific theory/calculations ;)
 
BrianStephan said:
What proof do u have that they dont Keeper
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What proof do you have that they do?

If I said "Unicorns exist" and told you "What proof do you have that they don't" you would lol at me - same. YOU must provide proof that it does. theories are not proof.
 
My physics is a little hazy, but wouldn't time travel violate the 2nd law of thermodynamics - Entropy tends to increase - and hence be impossible?
 
mercurial said:
Uhm, I kinda did a mini course on time travel. It's true. Mkay. And no, black holes are much, much bigger than that. We are talking about things that are millions of time bigger than our sun. This is all backed up by scientific theory/calculations ;)
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so why would going into one take you to an alternate dimension?:confused:
 
Keeper said:
so why would going into one take you to an alternate dimension?:confused:
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They (the quantum physicists), know this through scientific calculations. That's why they insist it is possible. I can't give you the details, as I'm just a layman :)
I can try and find out for you. I have the audio course at home. It's presented by a quantum physicist.
 
chiskop said:
You see? It works!
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Sure, I do it all the time. At the moment I can only travel back a minute or so at a time.

Wait, let me show you...
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HAHAHAHAHA! WIN! :D

but how does time work anyway? isn't time only one direction? how would you know if you're going forward or backwards in time? and how are things affected and where do you go while you would travel?
 
Hawkins believes its possible but in the same breath Einstein's theory disproves it so who knows
 
Size and black hole do not belong in the same sentence.

When mass implodes on itself size no longer has any bearing. When the average article talks about a massive back hole, they're actually talking about the radius of effect of the black hole on surrounding light / other "particles".

Give a scientist a loaded 9mm pistol, gingerly and carefully point the pistol at your head, and then ask him / her how much a black hole weighs and see if you survive.
 
mercurial said:
Quantum physicists are adamant that it's possible...
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ok answer me this - if you were able to travel through time - and you went to 5 minutes in the past - would there be two of you?
 
Keeper said:
ok answer me this - if you were able to travel through time - and you went to 5 minutes in the past - would there be two of you?
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That is one of the paradoxes, I believe. I'd really advise you take a listen to the course. I'll see later at home.
 
Sorry, not size. I meant to say mass. I always mix them up. Black holes have the mass of millions of stars, which is why it's gravitational effects are so powerful. The greater the mass, the greater the gravitational effect.
 
if you could time travel and if there wouldn't be a duplicate "you", why would it disappear?

-and on the flip side-

if you did see a duplicate of "you", what would happen if you kept walking into the time machine and went 5 minutes in the past? soon there would be a crowd of "you" meaning you are creating matter. matter is energy and energy can't be created or destroyed.
 
BrianStephan said:
Would it be possible in the near future to go back in time? And what about parallel universe's do they really exist?
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The linear nature of time as we understand it, the way it is taught in schools and the underlying assumptions in time travel tales, time paradoxes, etc. is totally wrong, according to quantum physicists (this is fairly old news). It is simply convenient to think of it in linear terms. We need to understand the proper nature of time to travel in it.

Logic dictates that there should be something like parallel universes. It will be a long time before we can visit them, however.
 
Geriatrix said:
I won't say never. The question you asked us is akin to you asking a caveman if its possible to build video cameras. :D
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more like asking a cockroach what time it is :D

Seriously though, I agree...if it was possible, it would have happened already (i.e. us being visited by people from the future)...who's to say we're in the present? Like the grandfather paradox, the answer to the question is probably more in the field of philosophy than in science
 
Keeper said:
if you could time travel and if there wouldn't be a duplicate "you", why would it disappear?

-and on the flip side-

if you did see a duplicate of "you", what would happen if you kept walking into the time machine and went 5 minutes in the past? soon there would be a crowd of "you" meaning you are creating matter. matter is energy and energy can't be created or destroyed.
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Thats like saying that if you move a table from one room to another you are "creating" matter.
Entropy is not a problem if we live in a multiverse, you simply move matter from one spacetime location in the multiverse to another.

Here's some layman targeted vids for those interested
[ame]http://www.youtube.com/watch?v=RnkE2yQPw6s[/ame]
[ame]http://www.youtube.com/watch?v=oRWwI61so5Q[/ame]
[ame]http://www.youtube.com/watch?v=AX-wueNuvLM[/ame]
 
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Ok look - if time travel was possible, then surely someone would travel back in time, and share all the knowledge that they have in the future (cure for aids, cancer, how to change matter into different matter, how to get cheap energy, etc) ?

surely this would speed up technology even faster and leap us even further ?

EDit: I see kompete has asked this already.
 
i've seen a lot of Michio |<aku's videos and sorry to say, but he just says stuff like "oh time travel WILL be possible - we'll have cars that can change their paint color and flying busses" - yeah yeah all stuff we've seen in sci-fi movies - but that's only an idea - not to say it's possible. he's a dreamer.

most of his stuff will probably happe, I agree - but time can not be changed.
 
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