Why our time dimension is about to become space-like

In summary, a group of theoretical astrobods at the University of Salamanca in Spain have proposed that the universe may lose its dimension of time, which would cause a reversal of the arrow of time and make the universe appear to be expanding and accelerating away from us. This idea, although strange, has some evidence to support it and could potentially explain some phenomena in the universe. However, it is currently untestable and may lead to even more confusion about the nature of the universe.
  • #1
SF
It don’t get much weirder than this. The universe is about to lose its dimension of time says a group of theoretical astrobods at the University of Salamanca in Spain. And they got the evidence to prove it.

[..]

This ain’t entirely bonkers and here’s why. Bars Mars has calculated what it’s like to be an observer in a universe that is about to flip and get this: it would look as if it were expanding and accelerating away from us. Sound familiar?

http://arxivblog.com/?p=71
 
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  • #2
So... what would happen to us (if we are still around) when the signature changed?
 
  • #3
SF said:
It don’t get much weirder than this. The universe is about to lose its dimension of time says a group of theoretical astrobods at the University of Salamanca in Spain. And they got the evidence to prove it.

And who says string theory can't predict anything? The corollary is that it will be the last theory ever proved. :smile:
 
  • #4
I tried writing this down for future reference, but it unwrote itself.
 
  • #5
Huh, that is weird. Just when you think you've heard everything!


It is an interesting idea but unless there is someway to actually test and verify it is correct it is just a curious exercise :-p
 
  • #6
Is there anyonyone physisist who understand time or space as dimensions other than mathemathecal parameters? In mij opinion one can only get a sensible physical meaning of space-time if this is seen together with (its) energy-density. Time and space by themselves don't exist on their own, they are just mathematical parameters but can't be measured , can they?
So IMO the question can't be a good physical question?
 
  • #7
Good observation, Brad! The hypothesis is untestable by any means imaginable. Consequences would invert to casual factors whenever the arrow of time 'flipped', resulting in an even more confusing universe.
 

Related to Why our time dimension is about to become space-like

1. Why is our time dimension becoming space-like?

This theory is based on the concept of spacetime, which combines the dimensions of space and time into a single entity. According to Einstein's theory of general relativity, gravity can warp and bend spacetime. As our universe expands, the fabric of spacetime is stretched, causing time to become more like a spatial dimension.

2. What evidence supports this theory?

One piece of evidence is the expansion of our universe. As the universe expands, the rate at which time passes also changes. This is known as cosmological time dilation. Additionally, observations of distant galaxies have shown that the expansion of the universe is accelerating, further supporting the idea of a space-like time dimension.

3. How will this change affect our perception of time?

If our time dimension does become more space-like, our perception of time may change. Time may begin to feel more like a physical dimension that we can move through, rather than a constant flow. It may also become more difficult to measure and track time accurately.

4. What implications does this have for the future?

If our time dimension does become more space-like, it could have major implications for the future of our universe. It could potentially lead to a "Big Rip" scenario, where the expansion of the universe accelerates to the point where it tears apart all matter and even the fabric of spacetime itself.

5. Is there any way to prevent this change from happening?

At this time, there is no known way to prevent the time dimension from becoming more space-like. However, further research and understanding of spacetime could potentially lead to new insights and ways to manipulate or control it. Ultimately, the fate of our time dimension remains a topic of ongoing scientific debate and investigation.

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