This article ranks among the top 3 science articles I read in 2015. I really enjoyed it, I hope you do too!

CAVEAT: The article is quite long,only read if you are going to see it through.It is divided into 2 parts for ease of perusing.


Why is it you can break an egg, but not make the pieces spring back together again? To find out, we have to go back to the birth of the universe

There's egg on your face, literally. You tried to juggle some eggs, it all went wrong, and now you've got to shower and change your clothes.

Wouldn't it be faster to just un-break the egg? Breaking it only took a few seconds, so why not do that again, but in reverse? Just reassemble the shell and throw the yolk and the white back inside. You'd have a clean face, clean clothes, and no yolk in your hair, like nothing ever happened.


Sounds ridiculous — but why? Why, exactly, is it impossible to un-break an egg?

It isn't. There's no fundamental law of nature that prevents us from un-breaking eggs. In fact, physics says that any event in our day-to-day lives could happen in reverse, at any time. So why can't we un-break eggs, or un-burn matches, or even un-sprain an ankle? Why don't things happen in reverse all the time? Why does the future look different from the past at all?

It sounds like a simple question. But to answer it, we've got to go back to the birth of the universe, down to the atomic realm, and out to the frontiers of physics.


Like many stories about physics, this one starts with Isaac Newton. In 1666, an outbreak of bubonic plague forced him to leave the University of Cambridge, and move back in with his mother in the Lincolnshire countryside. Bored and isolated, Newton threw himself into the study of physics.

He came up with three laws of motion, including the famous maxim that every action has an equal and opposite reaction. He also devised an explanation of how gravity works.

Newton's laws are astonishingly successful at describing the world. They explain why apples fall from trees and why the Earth orbits the Sun. But they have an odd feature: they work just as well backwards as forwards. If an egg can break, then Newton's laws say it can un-break.

This is obviously wrong, but nearly every theory that physicists have discovered since Newton has the same problem. The laws of physics simply don't care whether time runs forwards or backwards, any more than they care about whether you're left-handed or right-handed.

But we certainly do. In our experience, time has an arrow, always pointing into the future. "You might mix up east and west, but you would not mix up yesterday and tomorrow," says Sean Carroll, a physicist at the California Institute of Technology in Pasadena. "But the fundamental laws of physics don't distinguish between past and future."

The first person to seriously tackle this problem was an Austrian physicist named Ludwig Boltzmann, who lived in the late 19th century. At this time, many ideas that are now known to be true were still up for debate. In particular, physicists were not convinced – as they are today - that everything is made up of tiny particles called atoms. The idea of atoms, according to many physicists, was simply impossible to test.

Boltzmann was convinced that atoms really did exist. So he set out to use this idea to explain all sorts of everyday stuff, such as the glow of a fire, how our lungs work, and why blowing on tea cools it down. He thought he could make sense of all these things using the concept of atoms.

A few physicists were impressed with Boltzmann's work, but most dismissed it. Before long he was ostracised by the physics community for his ideas.

He got into particularly hot water because of his ideas about the nature of heat. This may not sound like it has much to do with the nature of time, but Boltzmann would show that the two things were closely linked.

At the time, physicists had come up with a theory called thermodynamics, which describes how heat behaves. For instance, thermodynamics describes how a refrigerator can keep food cold on a hot day.

Boltzmann's opponents thought that heat couldn't be explained in terms of anything else. They said that heat was just heat.

Boltzmann set out to prove them wrong. He thought heat was caused by the random motion of atoms, and that all of thermodynamics could be explained in those terms. He was absolutely right, but he would spend the rest of his life struggling to convince others.

Boltzmann started by trying to explain something strange: "entropy". According to thermodynamics, every object in the world has a certain amount of entropy associated with it, and whenever anything happens to it, the amount of entropy increases. For instance, if you put ice cubes into a glass of water and let them melt, the entropy inside the glass goes up.

Rising entropy is unlike anything else in physics: a process that has to go in one direction. But nobody knew why entropy always increased.

Once again, Boltzmann's colleagues argued that it wasn't possible to explain why entropy always went up. It just did. And again, Boltzmann was unsatisfied, and went searching for a deeper meaning. The result was a radical new understanding of entropy — a discovery so important that he had it engraved on his tombstone.

Boltzmann found that entropy measured the number of ways atoms, and the energy they carry, can be arranged. When entropy increases, it's because the atoms are getting more jumbled up.

According to Boltzmann, this is why ice melts in water. When water is liquid, there are far more ways for the water molecules to arrange themselves, and far more ways for the heat energy to be shared among those molecules, than when the water is solid. There are simply so many ways for the ice to melt, and relatively few ways for it to stay solid, that it's overwhelmingly likely the ice will eventually melt.

Similarly, if you put a drop of cream into your coffee, the cream will spread throughout the entire cup, because that's a state of higher entropy. There are more ways to arrange the bits of cream throughout your coffee than there are for the cream to remain in one small region.

Entropy, according to Boltzmann, is about what's probable. Objects with low entropy are tidy, and therefore unlikely to exist. High-entropy objects are untidy, which makes them likely to exist. Entropy always increases, because it's much easier for things to be untidy.

That may sound a bit depressing, at least if you like your home to be well-organised. But Boltzmann's ideas about entropy do have an upside: they seem to explain the arrow of time.

Boltzmann's take on entropy explains why it always increases. That in turn suggests why we always experience time moving forwards. If the universe as a whole moves from low entropy to high entropy, then we should never see events go in reverse.

We won't see eggs un-break, because there are lots of ways to arrange the pieces of an egg, and nearly all of them lead to a broken egg rather than an intact one. Similarly, ice won't un-melt, matches won't un-burn, and ankles won't un-sprain.

Boltzmann's definition of entropy even explains why we can remember the past but not the future. Imagine the opposite: that you have a memory of an event, then the event happens, and then the memory disappears. The odds of that happening to your brain are very low.

According to Boltzmann, the future looks different from the past simply because entropy increases. But his pesky opponents pointed out a flaw in his reasoning.

Boltzmann said that entropy increases as you go into the future, because of the probabilities that govern the behaviour of small objects like atoms. But those small objects are themselves obeying the fundamental laws of physics, which don't draw a distinction between the past and the future.

So Boltzmann's argument can be turned on its head. If you can argue that entropy should increase as you go into the future, you can also argue that entropy should increase as you go into the past.


Boltzmann thought that, because broken eggs are more likely than intact ones, it was reasonable to expect intact eggs to turn into broken ones. But there's another interpretation. Intact eggs are unlikely and rare, so eggs must spend most of their time broken, very occasionally leaping together to become intact for a moment before breaking again.

In short, you can use Boltzmann's ideas about entropy to argue that the future and the past should look similar. That's not what we see, so we're back to square one. Why is there an arrow of time at all?

Boltzmann suggested several solutions to this problem. The one that worked best came to be known as the past hypothesis. It's very simple: at some point in the distant past, the universe was in a low-entropy state.

If that's true, then the flaw in Boltzmann's reasoning disappears. The future and the past look very different, because the past has much lower entropy than the future. So eggs break, but they don't un-break.

This is neat, but it raises a whole new question: why is the past hypothesis true? Low entropy is unlikely, so why was the entropy of the universe in such a remarkable state sometime in the distant past?

Boltzmann never managed to crack that one. A manic-depressive whose ideas had been rejected by much of the physics community, he felt sure that his life's work would be forgotten. On a family holiday near Trieste in 1906, Ludwig Boltzmann hanged himself.

His suicide was particularly tragic since, within a decade, physicists accepted his ideas about atoms. What's more, in the decades that followed, new discoveries suggested that there might be an explanation for the past hypothesis after all.

In the twentieth century, our picture of the universe changed radically. We discovered that it had a beginning.

In Boltzmann's time, most physicists believed that the universe was eternal – it had always existed. But in the 1920s, astronomers discovered that galaxies are flying apart. The universe, they realised, is expanding. That means everything was once close together.

Over the next few decades, physicists came to agree that the universe began as an incredibly hot, dense speck. This quickly expanded and cooled, forming everything that now exists. This fast expansion from a tiny hot universe is called the Big Bang.

This seemed to support the past hypothesis. "People said 'okay, the trick is clearly that the early universe had low entropy,'" says Carroll. "But why [entropy] was ever low in the first place, 14 billion years ago near the Big Bang, is something we don't know the answer to."

It's fair to say that an enormous cosmic explosion doesn't sound like something with low entropy. After all, explosions are messy. There are plenty of ways of rearranging the matter and energy in the early universe so that it is still hot, tiny, and expanding. But as it turns out, entropy is a little different when there's so much matter around.

Imagine a vast empty region of space, in the middle of which is a cloud of gas with the mass of the Sun. Gravity pulls the gas together, so the gas will get clumpy and ultimately collapse into a star. How is this possible, if entropy always increases? There are more ways to arrange the gas when it's wispy and scattered.

The importance of being clumpy

The answer is that gravity affects entropy, in a way that physicists still don't fully understand. With truly massive objects, being clumpy is higher entropy than being dense and uniform. So a universe with galaxies, stars and planets actually has a higher entropy than a universe filled with hot, dense gas.

This means we have a new problem. The sort of universe that emerged immediately after the Big Bang, one that is hot and dense, is low-entropy and therefore unlikely. "It's not what you would randomly expect out of a bag of universes," says Carroll.

So how did our universe start in such an unlikely state? It's not even clear what kind of answer to that question would be a satisfying one. "What would count as a scientific explanation of the initial state [of the universe]?" asks Tim Maudlin, a philosopher of physics at New York University.

One idea is that there was something before the Big Bang. Could that account for the low entropy of the early universe?

Carroll and one of his former students proposed a model in which "baby" universes are constantly popping into existence, calving off from their parent universe and expanding to become universes like our own. These baby universes could start out with low entropy, but the entropy of the "multiverse" as a whole would always be high.

If that's true, the early universe only looks like it has low entropy because we can't see the bigger picture. The same would be true for the arrow of time. "That kind of idea implies that the far past of our big-picture universe looks the same as the far future," says Carroll.

But there's no wide agreement on Carroll's explanation of the past hypothesis, or any other explanation. "There are proposals, but nothing is even promising, much less settled," says Carroll.

Part of the trouble is that our best theories of physics can't actually handle the Big Bang. Without a way to describe what happened at the universe's birth, we can't explain why it had low entropy.

Modern physics relies on two major theories. Quantum mechanics explains the behaviour of small things like atoms, while general relativity describes heavy things like stars. But the two can't be made to combine.

So if something is both very small and very heavy, like the universe during the Big Bang, physicists get a bit stuck. To describe the early universe, they need to combine the two theories into a "theory of everything".

This ultimate theory will be the key to understanding the arrow of time. "Finding that theory will ultimately let us know how nature builds space and builds time," says Marina Cortês, a physicist at the University of Edinburgh in the UK.

Unfortunately, despite decades of trying, nobody has managed to come up with a theory of everything. But there are some candidates.

The most promising theory of everything is string theory, which says that all subatomic particles are actually made of tiny strings. String theory also says that space has extra dimensions, beyond the familiar three, that are curled up to microscopic size, and that we live in a kind of multiverse where the laws of physics are different in different universes.

This all sounds quite outlandish. Nevertheless, most particle physicists see string theory as our best hope for a theory of everything.

But that doesn't help us explain why time moves forwards. Like almost every other fundamental physical theory, the equations of string theory don't draw a strong distinction between the past and the future.

String theory, if it turns out to be correct, might not help explain the arrow of time. So Cortês is trying to come up with something better.

Working with Lee Smolin of the Perimeter Institute in Waterloo, Canada, Cortês has been working on alternatives to string theory that incorporate the arrow of time at a fundamental level.

Cortês and Smolin suggest that the universe is made up of a series of entirely unique events, never repeating itself. Each set of events can only influence events in the next set, so the arrow of time is built in. "We are hoping that if we can use these types of equations to do cosmology, we can then arrive at the problem of the initial conditions [of the universe] and find they're not as special," says Cortês.

This is completely unlike Boltzmann's explanation, in which the arrow of time emerges as a kind of accident from the laws of probability. "Time isn't really an illusion," says Cortês. "It exists and it's really moving forward."

But most physicists don't see a problem with Boltzmann's explanation. "Boltzmann pointed the correct direction to the solution here, a long time ago," says David Albert, a philosopher of physics at Columbia University in New York. "There's a real hope that if you dig carefully enough, the whole story is in what Boltzmann said."

Carroll agrees. "If you have that low-entropy Big Bang, then we're done," he says. "We can explain all the differences between the past and the future."

One way or another, to explain the arrow of time we need to explain that low-entropy state at the beginning of the universe. That will take a theory of everything, be it string theory, Cortês and Smolin's causal sets, or something else. But people have been searching for a theory of everything for 90 years. How do we find one? And how do we know we have the right one once we've got it?

We could test it using something very small and very dense. But we can't go back in time to the Big Bang, and regardless of what a recent blockbuster movie suggested, we also can't dive into a black hole and send information back about it. So what can we do, if we really want to explain why eggs don't un-break?

[b]For now, our best hope lies with the largest machine in human history. The Large Hadron Collider (LHC) is a particle accelerator that runs in a 27km circle under the border of France and Switzerland. It smashes protons together at nearly the speed of light. The phenomenal energy of these collisions creates new particles.

The LHC has been closed for repairs for the last two years, but in the spring of 2015 it will turn back on — and for the first time, it will be operating at full power. At half-strength in 2012, it found the long-sought-after Higgs boson, the particle that gives all the others mass. That discovery led to a Nobel Prize, but the LHC could now top it. With any luck, the LHC will catch a glimpse of new and unexpected fundamental particles that will point the way to a theory of everything.

It will take several years for the LHC to collect the necessary data, and for that data to be processed and interpreted. But once it's in, we may finally understand why you can't get that stupid egg off your face.[/b]

Source:http://www.bbc.com/earth/story/20150309-why-does-time-only-run-forwards

Wow! Wow!! Wow!!!

Cc :- menesheh, Hahn, johnydon22, sirwere, mrPhysics, teempakguy, prettytasha

Where is the article?

yh, i remember the higgs boson back then.
i would suggest getting youtube videos , all these science is better understood when we can visualize it ..afterall we aint Einstein and the other crazy lot of physicists....



...yet

Ahh..... The Grand Unified Theory. That piece of the puzzle that would make us stare at the maker of the universe and say "I see what you did there. Nice one"



I daresay any person who finally confirms the already postulated theories (string theory, Chaos Theory) or Creates his own will win a Nobel prize, straight!


You never know, it just might be a nigerian.............

SirWere:
Ahh..... The Grand Unified Theory. That piece of the puzzle that would make us stare at the maker of the universe and say "I see what you did there. Nice one"



I daresay any person who finally confirms the already postulated theories (string theory, Chaos Theory) or Creates his own will win a Nobel prize, straight!


You never know, it just might be a nigerian.............

I concur.

Dear Lord, I see what you did there. Nice one!

***claps***

I don't know if this here is similar?

For me all the answers lies in gravity. I think gravity is yet to be fully understood. When we fully comprehend how gravity works then we can cover more ground

if everything is in entropy, what a great discovery. I think, we are really in a multi universe.

nice one op

Dekatron:
Wow! Wow!! Wow!!!


Cc :- menesheh, Hahn, johnydon22, sirwere, mrPhysics, teempakguy

Where are these guys? Seems politics has taken them!

Feraz:
Where are these guys? Seems politics has taken them!

oh no!
I'm still around here.
i've decided to stay low key in this section for now.

Hmmn! I might as well comment.

Time . . . For me, is a very interesting dimension. However, i suppose that it is perfectly possible to go back in time. It's just that it would probably be extremely difficult.

Till then, i supposed i'll keep watching the science community for the genius who will crack the code. Because i'm not interested in doing it myself.

Teempakguy:
Hmmn! I might as well comment.

Time . . . For me, is a very interesting dimension. However, i suppose that it is perfectly possible to go back in time. It's just that it would probably be extremely difficult.

Till then, i supposed i'll keep watching the science community for the genius who will crack the code. Because i'm not interested in doing it myself.

. Come on, don't be a scaredy cat.

Blakjewelry:
For me all the answers lies in gravity. I think gravity is yet to be fully understood. When we fully comprehend how gravity works then we can cover more ground

gbam! I kinda agree with you.

Geofavor:

. Come on, don't be a scaredy cat.

it's not really that . . . I just don't have much interest in that aspect. I'm thinking of focusing on the possiblity of space quantization, and a geometric explanation of the electroweak and strong force.

I suspect that if we can prove that space is quantized, we can finally explain gravity and get over with it. Cracking THAT code seems more rewarding to me than trying to crack the time code.

nice one Op, just got my eyes strained reading the history of entropy

Anyway to your question, I think time doesn't go backwards because we see time as an entity, something that exist which it isn't... Its something that is existing because matter and space does exist, if matter and space were to be destroyed, there wouldn't be time.... My Time theory tho, I have been thinking about time travel lately and have concluded that rewinding or even traveling back in time is absolutely only gonna be a movie trick... Feel free to disprove my theory

Teempakguy:

Time . . . For me, is a very interesting dimension. However, i suppose that it is perfectly possible to go back in time. It's just that it would probably be extremely difficult....

@bolded
how do you think that did happen... Cus I doubt you've got any plausible theory to back up the bolded statement

Cc: Preboy

Sorry about your eyes,I'm sure you learned a thing or two though.

As for whether time travel is possible,My answer is a conditional yes.

The condition as someone earlier pointed out is if the effect of gravity on spacetime can be fully comprehended.

I read an article a while ago on how time and space operate in reverse in a black hole.

Let me explain. You can move forwards & backwards in space,but with regards to time,you can only ever move forward-never backward.

In a black hole however,the laws of physics operate in reverse. You can travel forwards & backwards in time when in a black hole,but you can only go forwards in a black hole-never backwards!

So,what does the earth have that a black hole does not have?

Gravity!

But it really is much complicated than that and for all the advances science has made,no one seems to have all the answers. As SirWere put it,a Nigerian might just crack this puzzle...fingers crossed here...

.

someone should quote more science inclined people

Sheikwonder:


Let me explain. You can move forwards & backwards in space,but with regards to time,you can only ever move forward-never backward.

In a black hole however,the laws of physics operate in reverse. You can travel forwards & backwards in time when in a black hole,but you can only go forwards in a black hole-never backwards!

...

my eyes are gonna be fine, I think... thank you anyway

I so didn't get the quoted part, pls elaborate

Also, i understand that gravity could affect time... reversing time or accessing a particular time in the past is something I don't think black holes can do... or is even affected by physis laws

I believe time isn't stored, how do you then rewind or access something that isn't stored somewhere

Preboy:
nice one Op, just got my eyes strained reading the history of entropy

Anyway to your question, I think time doesn't go backwards because we see time as an entity, something that exist which it isn't... Its something that is existing because matter and space does exist, if matter and space were to be destroyed, there wouldn't be time.... My Time theory tho, I have been thinking about time travel lately and have concluded that rewinding or even traveling back in time is absolutely only gonna be a movie trick... Feel free to disprove my theory


@bolded
how do you think that did happen... Cus I doubt you've got any plausible theory to back up the bolded statement

well, travelling back in time can be achieved by reversing entropy.
You see, by considering time as a dimension of the universe, we can state that it is in fact, being constantly generated as quantum bits. Our brains percieve this as continuous. If the universe is expanding, it follows that as spatial dimensions are being created, so is the temporal. My point here is, it would be perfectly possible to reverse time IF it was in quantum form. We would just simply hop back into the past.

But i assure you, it definitely won't look like hollywood. Humans live inside of time. So, if you reverse it, they will also reverse along with it. We will have to evolve into transdimensional species before time travel can even begin to make sense.

Cc:Preboy

Quite simply,you can always move from point A to point B and also perform the said action in reverse. When you go from your house to school [or work],you go forwards in space. When you return,you go backwards in space,you dig?

With time you can only go forwards i.e When you go to school[or work],time ticks forward. When you are done,and want to return home time still ticks forward-it doesn't go back just because you are going back home.Hence they say that "time waits for no man".

In a black hole,the exact opposite of the aforementioned happens.When you travel in a black hole you are on a one-way trip i.e you can only ever go forwards in a black hole. In a sense,time has swapped it's role with space.

If you still don't understand,I may have to refer you to an external link. I only hope you don't get more confused.

Cc: Preboy
www.bbc.com/earth/story/20150525-a-black-hole-would-clone-you

Teempakguy:
well, travelling back in time can be achieved by reversing entropy.
You see, by considering time as a dimension of the universe, we can state that it is in fact, being constantly generated as quantum bits. Our brains percieve this as continuous. If the universe is expanding, it follows that as spatial dimensions are being created, so is the temporal. My point here is, it would be perfectly possible to reverse time IF it was in quantum form. We would just simply hop back into the past.

But i assure you, it definitely won't look like hollywood. Humans live inside of time. So, if you reverse it, they will also reverse along with it. We will have to evolve into transdimensional species before time travel can even begin to make sense.

"well, travelling back in time can be achieved by reversing entropy" reversing entropy?... I don't think that is possible and certainly don't see what thermo dynamics has to do with time travel or reversal


Time as a dimension being constantly generated by quantum bits.... Any proof to this statement, cus it doesn't seem plausible et al


"My point here is, it would be perfectly possible to reverse time IF it was in quantum form"
Well it isn't, or rather there is no proof it is... Any other brilliant theories

nice op.
just opened my eyes on the implications of "entropy ". many questions yet unanswered

Teempakguy:
well, travelling back in time can be achieved by reversing entropy.
You see, by considering time as a dimension of the universe, we can state that it is in fact, being constantly generated as quantum bits. Our brains percieve this as continuous. If the universe is expanding, it follows that as spatial dimensions are being created, so is the temporal. My point here is, it would be perfectly possible to reverse time IF it was in quantum form. We would just simply hop back into the past.

But i assure you, it definitely won't look like hollywood. Humans live inside of time. So, if you reverse it, they will also reverse along with it. We will have to evolve into transdimensional species before time travel can even begin to make sense.

Well let me bring a bit of sprituality. Einstein said travelling to the past requires one to surpass the speed of light, The spiritual realm operates at a higher vibration and movement rate, we all know that matter vibrates in the physical realm and we theorize that vibration stops at 0° but since the law of thermodynamics says achieving 0° is impossible then we can say all physical matter vibrates. in this realm spirit beings can travel from the planet heaven somewhere in the north star polaris to earth as quickly as they do necessitates that they travel greater than light and a fact of Quantum mechanics apply here as an object approach the speed of light time slows. Funny enough even as trans dimensional entities being able to travel faster than light the highest they could do is predict the future. Maybe its totally against the law of the universe to go back in time.

Preboy:

"well, travelling back in time can be achieved by reversing entropy" reversing entropy?... I don't think that is possible and certainly don't see what thermo dynamics has to do with time travel or reversal


Time as a dimension being constantly generated by quantum bits.... Any proof to this statement, cus it doesn't seem plausible et al


"My point here is, it would be perfectly possible to reverse time IF it was in quantum form"
Well it isn't, or rather there is no proof it is... Any other brilliant theories

you don't know that nah . . . If space is quantized, then it would be made of discrete parts that make the whole. And there would be a point where we cannot divide it further. Since space and time are connected, if one is quantized, the other should. We've already discovered that energy and mass is quantized. Why not space?

Also, removing the question of possibility, reversing entropy will in fact simulate a time reversal. That is if we can do it.

Now, if time is quantized, then we can travel back in it. We do this by manipulating the parts it's made of. We already know that at light speed, time grinds to a halt. Maybe this is because at that point, the object is moving just as fast as the time bits are created. Running as fast as time. Using tachyonic matter, one can run faster than time. Causing a rewind time travel. It's totally possible within a quantized universe.

So the question i should be asking myself is, how do i prove this experimentally?

GeniusDavid:


Well let me bring a bit of sprituality. Einstein said travelling to the past requires one to surpass the speed of light, The spiritual realm operates at a higher vibration and movement rate, we all know that matter vibrates in the physical realm and we theorize that vibration stops at 0° but since the law of thermodynamics says achieving 0° is impossible then we can say all physical matter vibrates. in this realm spirit beings can travel from the planet heaven somewhere in the north star polaris to earth as quickly as they do necessitates that they travel greater than light and a fact of Quantum mechanics apply here as an object approach the speed of light time slows. Funny enough even as trans dimensional entities being able to travel faster than light the highest they could do is predict the future. Maybe its totally against the law of the universe to go back in time.

maybe . . . Maybe not.
I'm in favour of the possibilty of time travel. I don't know why though

Teempakguy:
maybe . . . Maybe not.
I'm in favour of the possibilty of time travel. I don't know why though

the possibility of time travel is possible and may not be.

quantizing time is still not yet proved. a proton has a mass of to the power of -27kg, that of the electron to the power of -31kg. At this point, quantization is possible. the smallest measured time is to the power of -15s(around it shaa ). this figure is still big and quantization may not really be possible.

Also, Entropy may not be reversed, it's theory states that entropy is always on the increase. reversing it will change Everything about Physics.

Even the worlds entropy is on the increase. And if u say it can be reversed, then we await the manifestation . let me drop my pencil here for now.

The concept of quantizing time is even funny. An overview of quantization is that they are certain allowed values of a particular thing.

Applying it on time, it means, we may have certain values of time.

How can we then quantize it.

Sheikwonder:
Cc:Preboy

Quite simply,you can always move from point A to point B and also perform the said action in reverse. When you go from your house to school [or work],you go forwards in space. When you return,you go backwards in space,you dig?

With time you can only go forwards i.e When you go to school[or work],time ticks forward. When you are done,and want to return home time still ticks forward-it doesn't go back just because you are going back home.Hence they say that "time waits for no man".

In a black hole,the exact opposite of the aforementioned happens.When you travel in a black hole you are on a one-way trip i.e you can only ever go forwards in a black hole. In a sense,time has swapped it's role with space.

If you still don't understand,I may have to refer you to an external link. I only hope you don't get more confused.

Read the article, it seems plausible but not definite since no one has ever been in a black hole

And I don't think a black hole actually reverses time, if it did/does, then you'd not be in it(black hole), you'd return back to where you were at(probably your spaceship) before being plunged into the black hole... Thus I don't think space or time moves in reverse at all in a black hole


assuming it does reverse time, do you mean we have to deliberately creating and jumping into a black hole every time we wanna reverse time?