New study says universe expanding faster and is younger - Sensationalist Headlines

I have no idea what you're basing that estimation on. As far as I know, we don't have an extensive enough record of sentient-inhabited star system history to build a probability model off of.

So let me get this straight, you are suggesting that we do not survive long enough to assert our superiority over any - and all - alien races? I don't suppose you're also a heretic?

I mean, I dunno, if you imagine that humanity somehow manages to stabilize Earth's climate and develop sustainable global consumption through 100% renewables, and then undergoes effectively infinite scientific and technological innovation, it's quite possible that in ten million years the galaxy-spanning civilization that was once the human race trapped on lil' old Terra in the Sol system could begin to colonize other galaxies and begin to exploit the Local Group's resources. To cross the vast gulfs between galactic neighbourhoods would require methods of travel that bypass linear travel through the third dimension, like wormholes or something far more esoteric, but if nothing is impossible to this apex mind of a civilization then it'd be foolish to draw a line now. Oh wait you're just posting 40K memes never mind

Given other aliens would have the same restrictions, for all practical purposes, our galaxy is our universe.

We are actually in the prime time to see the universe as it is and learn its secrets, too much later and distant galaxies will fade from view, which could make future civilizations think their galaxy is one of the only few in the universe.

Interesting. Space is linked to time in the beauty of the fact of expansion. As space spends more time existing, it spreads outwardly. In the 4th dimension time is as close to a distance as it is time. If you could walk across time, one could simply colonize a galaxy by moving time backward and stepping over a distance to where a new galaxy would form in the future and walk forward again to the present. Effectively covering a billion years in a footstep. If we could create a system to dip back to the more violent past of the universe we could literally step into a new galaxy by bending time as the distances involved would dip as time did.

To the best of our current knowledge, time travel is only possible in one direction, and this is because we have not yet worked out a conceptual way of reversing causality. Many physics equations/phenomena are fully time-reversible, in that they can operate going both ways, but in practice they are causally limited. Reversing causality introduces all sorts of hellish distortions into our perception of the universe -- it means I can eat a cookie and then give the same cookie to you. Being able to unsmash glass and unstab people back to life is something our monkey brains did not evolve to understand.

You can't go backwards in time. If you were able to perceive time you'd be seeing toroids intead of galaxies, planets and stars, you'd see an infinite number of you's behind you as you walked forwards each infinite mirage seamlessly capturing your walk cycle. You can perceive the entirety of the past just not go to the past. you could for sure go forwards in time relative to people effected by the gravitational "dip" of the planet they live on though!

so if the universe is younger and it is expanding faster than we originally thought when it was assumed to be bigger? wouldnt that mean the acceleration is slowing down leading to big crunch whatever

https://youtu.be/ENsDyVqeuxs

Sorry. Minus points for missing the reference in the first post. It is very interesting though, and there's more to it like you said, which is currently impossible by any conventional means, but given long enough time perhaps physics can become bendable to man's will, at least to some extent? After all, it is impossible to prophesies the future, and there are a lot of unsolved problems in physics yet to be solved.

Universe just been bulking up for the gym. Once it's closer to summer it'll start doing more cardio and cutting calories.

how did you know that was what i was doing when i read that post? GET OUT OF MY HEAD

Truth be told we're just as far away from time travel as we are FTL travel. It would be just another method of space travel. Actually thinking about it it would essentially be the same as the "warp" principles as in the use of a bubble in space to move through space without being affected by the effects of near light speed.

I'm not trying to debunk what you're saying, I'm not a crackpot working on a time machine. But why would causality have to bend itself to our intuitions? And isn't unsmashing glass possible, just so chaotic that there's not really a process to do it (besides melting and recooling it)

I'm no Stephen Hawking, but causality is a consequence of the universe's natural state of being a thermodynamic sequence that is constantly trying to increase its entropy by becoming more chaotic and scattered. Causality doesn't bend to our intuitions, we are slaves to the fundamental forces and mechanics of the universe: the arrow of time is, for the moment, inescapable, and until we discover how to bend it in unnatural ways, we are imprisoned within causality itself. You cannot smash a drinking glass in such a way that it fuses itself back together in its original, unsmashed state. You cannot throw a dandelion flower into a burning fire and then reach in and un-burn the flower to its bright yellow original nature. You cannot take an exploded grenade and un-detonate it back into its compact shape. You cannot un-digest the beer you drank the other day by sucking up the urine back through your dickhole and reversing the process of filtering it through your liver (thank god or dinner parties would be aaaawkward). These things only go in one direction, and it is extremely hard to envision a universe in which causality was reversible and the universe naturally pushed itself towards LESS entropy because everything in our universe, that we're aware of, is moving forward and only forward in time. If causality was reversible, then it is possible that you could spontaneously die from malnutrition as food un-ate itself and removed its nutrients from your body. We really, really, really aren't built to comprehend a universe that lets time go backwards when it wants. And the scary part is, physics is discovering that there just may in fact be things going backwards in time. Though, we're talking about subatomic particles and not Dodge Caravans.