I just found this article that, after a quick scan, describes the basics of the Block Universe. There's no shortage of papers and articles on the subject so you'll be able to find one at whatever level you're comfortable with.

Feb 13, 2023,16:08 PM
 

interestingengineering.com

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Why does time flow forward?

 
 By: andrea~ : February 13th, 2023-11:43
As a watch enthusiast and a person who is deeply fascinated by science, I felt like this could be a good idea for a post (keep in mind that I am not an expert in any of the things I'm talking about). One of the reasons why I love watchmaking is the fact t...  

I never thought this counted as an explanation

 
 By: blau : February 13th, 2023-12:03
The second law of thermodynamics--the idea that entropy must always increase--itself assumes the directionality of time. 'Increase' relative to what? The PREVIOUS entropy level!

Exactly

 
 By: andrea~ : February 13th, 2023-12:05
In order to travel back in time you would need to reverse every single chemical process in the universe, which would mean going from a state of higher to a state of lower entropy, which is impossible according to Thermodynamics.

OR....

 
 By: InHavenPro : February 13th, 2023-21:56
Just travel faster than the speed of light in order to escape the 'light cone' that our universe resides in....

Easy peasy 😆

 
 By: andrea~ : February 13th, 2023-22:06

In Block Universe theory, time and entropy would only appear to be one directional due to limitations of human perception since the past, present, and future all exist simultaneously.

 
 By: Emil Wojcik : February 13th, 2023-15:48
General relativity first gave us the basis for the block universe. Just thought I'd add some additional confusion to your question.

haha confusion is always welcome

 
 By: andrea~ : February 13th, 2023-15:51
That is interesting. I'll look further into block universe theory

Thanks!

 
 By: andrea~ : February 13th, 2023-16:19
I'll give it a read

If the universe reaches a state of thermal equilibrium and time stops…

 
 By: kev09 : February 13th, 2023-17:27
…do you think Rolex will reduce the price of their watches? ) Sorry, couldn’t resist! Regards Kev.

He he😆

 
 By: kev09 : February 13th, 2023-19:11

You're going to love....

 
 By: InHavenPro : February 13th, 2023-22:53
this T-Shirt designed by Dr. Sean Carroll which I bought a while back.... We exist at one of the most favorable points in time relative to the entropy vs complexity balance ........ ...  

I love it!

 
 By: andrea~ : February 14th, 2023-08:08

I actually....

 
 By: InHavenPro : February 14th, 2023-08:20
found a link to the site that sells his T-Shirt designs (TeePublic), so I'll text it to you in a PM. They are a very reasonable 24 EUR in case you are interesting in getting one or more. There are even two color schemes available for this same design! Fin... 

My understanding of entropy is a bit different ...

 
 By: COUNT DE MONET : June 6th, 2023-19:11
High entropy does not simply mean big dissorder. Example: A sand castle has low entropy because there is only one way (or very few) to form it as a castle, make it look like a castle. A sand pile instead has high entropy, because there are trillion of tri... 

It’s a cycle

 
 By: Stirling Newall : September 3rd, 2023-07:53
Time does not flow forward - time does not exist. Only change exists. All change is cyclical. The ocean evaporates and clouds form, clouds condense, rain falls, rivers flow, water returns to the ocean. There is no time only cyclical change. Everything you...