5 Reasons We May Live in a Multiverse

5 Reasons We May Live in a Multiverse

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Halb

Original Poster:

53,012 posts

190 months

Saturday 10th August 2013
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http://www.space.com/18811-multiple-universes-5-th...

The universe we live in may not be the only one out there. In fact, our universe could be just one of an infinite number of universes making up a "multiverse."

Tycho

11,848 posts

280 months

Saturday 10th August 2013
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So we live in multiple universes and I somehow get stuck in the st version frown


I was reading a book about this by Michio Kaku. http://mkaku.org/

It messes with your head but is a fantastic theory which would be fantastic if true and we could travel between them.

Halb

Original Poster:

53,012 posts

190 months

Saturday 10th August 2013
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Just about to start reading The Long War, which deals with multiple realities.

Tycho

11,848 posts

280 months

Saturday 10th August 2013
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Looks interesting, might pick it up. Love this kind of thing along with alternate history stuff.

Multi universe theory is mind bending stuff.

Hooli

32,278 posts

207 months

Tuesday 13th August 2013
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Discworld has to exist somewhere...

Halb

Original Poster:

53,012 posts

190 months

Friday 13th December 2013
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Hooli said:
Discworld has to exist somewhere...
I'd hope so...

Halmyre

11,572 posts

146 months

Friday 13th December 2013
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Hooli said:
Discworld has to exist somewhere...
Only in a universe where "magic" exists.

I recently read an interesting short story by Alastair Reynolds that has as its central theme the theory of multiple universes where the timeline splits depending on the outcome of an event. One of the characters points out that, if you repeatedly toss a coin, there must be a universe where it will always come up heads (or tails), which slightly fks with my head.

Simpo Two

87,124 posts

272 months

Friday 13th December 2013
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By definition you can't have five universes because 'uni' means 'one'. So each sub-verse is a 'quinverse'.

perdu

4,885 posts

206 months

Friday 13th December 2013
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Hmm, probably a polyverse (some polyverses...many polyverses...huge numbers of pol...) then.

Might make sense of Wallace's wrong trousers too.

It can be cheese then.

I read the Pratchett/Baxter collaborated story The Long Earth last year. Didn't get tempted into buying their newer one about a Long War.



But there's magic everywhere, innit!

Edited by perdu on Friday 13th December 21:18

Gaspode

4,167 posts

203 months

Friday 13th December 2013
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Tycho said:
So we live in multiple universes and I somehow get stuck in the st version frown
Actually, this one might be the best...

dodgyviper

1,201 posts

245 months

Saturday 14th December 2013
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Halmyre said:
I recently read an interesting short story by Alastair Reynolds that has as its central theme the theory of multiple universes where the timeline splits depending on the outcome of an event. One of the characters points out that, if you repeatedly toss a coin, there must be a universe where it will always come up heads (or tails), which slightly fks with my head.
Do like Reynolds books. Fine imagination.

However, I've never liked this 'tossed coin - outcome is chance etc'

The outcome isn't chance at all. If you were able to record and measure every parameter from spin rate, height attained, height of launch point, constitution of the ground at impact point etc etc then outcome is always predictable. We call it chance simply because we can't measure the process in realtime well enough to give an accurate result .

To say that the outcome is different, must imply that the energy vectors preceding the outcome have changed.

Which implies the tosser has tossed differently.

There are no decisions in nature. Merely changes of state which are utterly predictable (if you're a certain robot of Arthur Let's acquaintance ).


Its humans that make decisions and I doubt they fall outside of the robotic computational abilities of smart arse robots .



Dr Jekyll

23,820 posts

268 months

Saturday 14th December 2013
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dodgyviper said:
However, I've never liked this 'tossed coin - outcome is chance etc'

The outcome isn't chance at all. If you were able to record and measure every parameter from spin rate, height attained, height of launch point, constitution of the ground at impact point etc etc then outcome is always predictable. We call it chance simply because we can't measure the process in realtime well enough to give an accurate result .

To say that the outcome is different, must imply that the energy vectors preceding the outcome have changed.

Which implies the tosser has tossed differently.

There are no decisions in nature. Merely changes of state which are utterly predictable (if you're a certain robot of Arthur Let's acquaintance ).
But the whole point is that you can't measure the process totally accurately even in theory. Once you get to the quantum level a particle might be in any of multiple locations, in effect it is in all those locations, both the ones that ultimately lead to Heads and those that lead to tails.

dodgyviper

1,201 posts

245 months

Saturday 14th December 2013
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Lol I knew that but didn't think before I wrote.

However, I suspect the reason I didn't recall it is for the simple reason that I don't get it.

Always felt that the probability measurements were simply very accurate mappings of reality at a sub atomic level without understanding why these things actually occurr.

The latest I heard - there is only one electron in the whole universe. Mindcopulation

Genuine question, has anyone ever scientifically witnessed a macro event that was astonishing in its unpredictability due to quantum mechanics.

May be answering my own question but are diffraction experiments an example?

Dr Jekyll

23,820 posts

268 months

Sunday 15th December 2013
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But if there are an infinite number of universes there must be some where I win the lottery every week.

In fact there must be an infinite number where I win the lottery every week, but nowhere near as many as where I don't win it at all.

confused

trashbat

6,008 posts

160 months

Sunday 15th December 2013
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If there's an infinite number of universes, there must be one where there's none. Stick that in your stupid science pipe.

im

34,302 posts

224 months

Monday 16th December 2013
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We'd all better pray there are indeed parallel Universes because we're (the Human Race) going to need one to escape into when this one goes into deep freeze prior to being ripped apart at a sub-atomic level.

Something similar to the machine in the TV series 'Sliders' would be just the ticket.


The Nur

9,168 posts

192 months

Monday 16th December 2013
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im said:
We'd all better pray there are indeed parallel Universes because we're (the Human Race) going to need one to escape into when this one goes into deep freeze prior to being ripped apart at a sub-atomic level.

Something similar to the machine in the TV series 'Sliders' would be just the ticket.

I was thinking about Sliders just the other day. That and Quantum Leap.

Simpo Two

87,124 posts

272 months

Monday 16th December 2013
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im said:
We'd all better pray there are indeed parallel Universes because we're (the Human Race) going to need one to escape into when this one goes into deep freeze prior to being ripped apart at a sub-atomic level.
I thought we were going to be burned to a crisp when the sun turns into a red giant.

All we need is a spaceship in which to travel to more friendly climes. Migration if you like.


Or start a big self-sustaining community underground?

Catatafish

1,449 posts

152 months

Friday 20th December 2013
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Simpo Two said:
I thought we were going to be burned to a crisp when the sun turns into a red giant.

All we need is a spaceship in which to travel to more friendly climes. Migration if you like.


Or start a big self-sustaining community underground?
You've got a few billion years to put your feet up before that particular "end"

There is also another group of parallel universes - those running in the computers in other universes/multiverses/realms. No way of telling which, if any, you occupy.

Halb

Original Poster:

53,012 posts

190 months

Friday 20th December 2013
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The Long Earth is a book which deals with parallel Earths.

https://en.wikipedia.org/wiki/The_Long_Earth