Science
Related: About this forumIt’s possible that there is a “mirror universe” where time moves backwards, say scientists
by Olivia Goldhill
Although we experience time in one directionwe all get older, we have records of the past but not the futuretheres nothing in the laws of physics that insists time must move forward.
In trying to solve the puzzle of why time moves in a certain direction, many physicists have settled on entropy, the level of molecular disorder in a system, which continually increases. But two separate groups of prominent physicists are working on models that examine the initial conditions that might have created the arrow of time, and both seem to show time moving in two different directions.
When the Big Bang created our universe, these physicists believe it also created an inverse mirror universe where time moves in the opposite direction. From our perspective, time in the parallel universe moves backward. But anyone in the parallel universe would perceive our universes time as moving backward.
The Janus point
The first model, published a little over a year ago in Physical Review Letters, argues that that one of the basic implications of Newtons theory of gravity creates the conditions for time to move in a certain direction. Julian Barbour from the University of Oxford, Tim Koslowski from the University of New Brunswick and Flavio Mercati from the Perimeter Institute for Theoretical Physics, argue that for any confined system of particlesa self-contained universe such as our own, for examplegravity will create a point when the distance between particles is minimal.
more
http://qz.com/596514/its-possible-that-there-is-a-mirror-universe-where-time-moves-backwards-say-scientists/
HassleCat
(6,409 posts)They can go back to the days of segregated schools, etc.
valerief
(53,235 posts)Mosby
(16,342 posts)Don't remember the name.
What happened was at the very end of the universe expansion all the energy was used up and the universe switched directions, and time went "backwards", and started compressing the universe instead of expanding but the author described this at a human level where technologies existed and then, over time the building or tool would get better.
n2doc
(47,953 posts)The Practice Effect by David Brin
and a Star Trek- Animated series show- the Counter clock incident
Mosby
(16,342 posts)I think I'm recalling two different stories and blending them together, but the practice effect was definitely one of them.
You must read a lot of sci-fi.
I'm a big fan of Brin.
silverweb
(16,402 posts)[font color="navy" face="Verdana"]I've been trying to find it on YouTube, but can't. He finished a show talking about how cool it would be to be born old, with all the ailments that the elderly have, then go through life growing younger and younger, until ending up as a pampered infant and "going out" as an orgasm.
Miss you, George. I'm sure you'd have a lot to say about this new hypothesis!