I've been patiently waiting for Sabine to make a video on this topic. It's about time.

The past haunts me every day, whether it still exists or not.

“What the hell am I looking at??” “You’re looking at now, sir. Everything you’re seeing is happening now”

Even though I watched a lot of science videos it is the first time I heard about the block universe. Well explained. And now I am mindblown.

Also notice that our memories can have differences in this manner. My memories of 50 years ago ( I am 80 ) are in a distant past...but the things I did, that I wish I hadn't, such as being rude as a teenager to someone, and we never forget, is as if it was yesterday.

This starts to make sense when you think about how we percieve stars. If we observe one star that goes supernova 5 million light years away, and then another star that goes super nova 6 million light years away, each of those events happened a million years apart, and we just happen to be at the oberservable point to witness each at the same time.

Long ago a thought occurred to me about those films my teacher showed our class in grade school that being that the roll of film was all of time past and if you could pick a point or place along that roll is being a point in the past which you could hypothetically look at or even experience. Now it's interesting to see a smart person talking something in those same terms or similar thought exercise. Thank you for your 'films'.

This is the first video I see on this channel. This is very refreshing to have explanations without all the usual background music, hyperactive ton of speech, or lots of graphics moving around! The calm tone of the video is very good for learning!

This video made me realize how often we are watching the past. All KZfaq videos we watch in the present were made in some recent or distant past and can be played actively as if they are now in the present. All media and entertainment that’s recorded is that way. I think that’s why stories play such an important role in human development - story is time travel.

just when I thought I had it Sabine hits me with a "Anything exists now, elsewhere. all obervers viewpoints are equally valid = Everything exists now".

Love hearing your expounding the theories Sabine

I do love the dry humor woven into the ‘story telling’ and then referred to again randomly…a stand up comic schtick that amazingly turns a physics lecture into a conversation between friends. Brilliant.

Yes, it does! I'm sitting here in the English countryside, on a dark winter's night, looking high above me, into a sky full of stars; many of which are now dead - but because of my unfathomably distant vantage point, are still up there shining, still ‘alive’. It then follows that an alien being sat on the other side of the galaxy, looking our way through some kind of ‘advanced super telescope’, could maybe - just maybe, see my late mum and dad, meeting for the very first time on that dizzy late summer's evening they used to tell me all about. Believe it; somewhere, everything is still alive.

One of my favourite of your videos. Fascinating and mind-blowing 😊

Sabine good to see you back

As a working class layman, thank you for making this topic more accessible to me.

What blew my mind is that when Sabine gave examples of 'now', she knew I was watching the video. Amazing, great video.

World class! I enjoy every minute of your intellect honesty and humor. Bravo and thank you!

.. I am puzzled by time too.. having a nice memory is a divine gift and actually works like a time machine.. I am 54 now but one mental step back I am in a moment of time when I was 4 years old...and know how I felt on that moment... that is really really a gift... that is the only time travel we are capable of doing I think, but...let's listen to Sabine !

This woman can literally talk about anything and my concentration will never break

The strange things about getting old is that the intimate identification of here and now are slowly lost.One feels transposed into infinity more or less are alone.No longer in hope or fear, only observing.

My heart skipped a beat when I saw that face at 3:35. Didnt expect horror from a science video. it was terrifying. I love it!

Luv the content, gunna buy her book, also yeah she so adorable

Not exactly sure about what you said but i did enjoy the way you said it.

Time is a fluid, like a stream flowing in one direction. Anything with mass creates drag, causing time to bend around it like a big rock in the stream. Only things without mass can move freely in the stream at the same speed as the stream itself, and thus it doesn't experience time at all.

Every instance exists, but each version of us experiences it ONCE and as the moment changes so do we with it .... SO A DIFFRENT VERSION OF US , IS ALWAYS EXPERIENCING THAT MOMENT ...

Wow!! Beautifully presented and explained video!! 🌟☀️🚀✨️

Whether it still physically exists, or not, much of my past will haunt me forever. But I try to stay positive. 😎

It's so clear when you explain it. I think I'll be coming back to this video often. The idea that (at least) the past always exists is the only way I've been able to cope with the loss of my loved ones.

This has always been my favourite video of yours.

Got it, it makes perfect sense, the theta of trigoviani seens to hold true the way you explained but only works for nth tunnel d-1.

Immediately after watching this, I watched a documentary about Kurt Vonnegut, the author of "Slaughterhouse Five" and numerous other excellent novels. If for some reason you are unfamiliar with this book, it is about a man who becomes "unstuck in time". I read it many years ago. And it is the perfect literary accompaniment to Sabine's lecture.

When Sabine casually covers the question you have always been wondering about. 😁

I'm living the same time all my life and millions of different events. But I am still here at the same time. The same place everything is changing with me.

Wonderful explanation. It's the first chapter of her book 'Existential Physics', which is one of the best books I've read.

Once again you have hit it out of the park. Grateful for the clear way you explain the observer. It leaves a straight path forward. Or maybe this is it. Thank you so much.

All events exist now. 🤯 That is just crazy. Anything that's ever happened can be happening right now as long as you're in the right place at the right time.

At 3:35, that flash of the creepy monster was a nice touch! 😁

According to physics, Black Holes can and do warp space-time. So, were we able to determine the x,y,z where we need to enter and then amount of time we need before exiting we could effectively go back or forth in time. Quite a bit different to physically move in time, back and forth, than Observing ( t=d/v only works for linear time and only present)

Thanks Sabine!❤ Your videos are very nice. They make me feel like I have an understanding of the topics you cover

I've been metal detecting for 35 years. Each time I find a roman coin or medieval buckle I'm always aware I'm the first to see this light since it was lost. A direct link between Two periods of time.

I was watching this and had a thought about "now", as it regards to time. Since nothing moves faster than the speed of light and when we flip a light switch we see the light instantly, I think that means time moves forward at the speed of light.

I bought your book. You are amazing.

I just bought your book, “Existential Physics”. I can’t wait for it to arrive! You are such an inspiration to me.

I remember reading a sci-fi story where scientists used old photographs to go back in time. Something about the photos capturing the space/time co-ordinates.

Interesting perspective along with the killer comedy. Futurama is my favorite show. Haha.

I had some conversations along side with whom who never rests and keep blogging.Humanity is best form to reciprocate in gentle behavior

The block universe idea has comforted me for years. All the dead people we know, are still doing things with us "now".

In a way the past does exist and we can re-live them in our memories whether they are good or band moments. The past may not exist physically but it does mentally.

I find it easy to understand time as it relates to me but you mentioned space , I need further understanding of what you’re referring to . Is it distance ?

I wish there were more people in the world who ask these questions... Instead of burying their heads in the sand or following the nightly news brainwash program.

Its 3.00am and I couldn't sleep. Just watched this video and at long last I understand Einsteins Relativity theory. It's like a mist had cleared. After decades of uncertainty over it you have now explained it! Thank you so much!!!

I will have to watch this multiple times to understand my own example of this to confirm that this video is correct. I love this type of content.

Loving her detailed explanations.

Love the videos, hard to ignore the eyes. The look right through you.

OMG this is a truly incredible video, best one I have seen on the subject. This really is an incredibly good lecture. I have been studying this subject for many years, back then most of what I worked with was in Physical Review D and books. Some great books out there got me interested in physics and math, but I am very impressed by this video and the deep subjects you talk about. I was a math physics major, though the truth is that most of these fascinating concepts can be understood through thought alone. The math is certainly interesting. I had to see how it worked. The Tipler cylinder was my first interest, in the math model it is infinite in length so it does not collapse into a black hole. Anyway we know that time like coordinate becomes spacelike and spacelike becomes timelike, but I had to see the math. I used to talk to Tipler, and Gott on the phone way back, then later I got into Caltech though I did not go. In any case I study this stuff for fun, and this video is magnificent. BRAVO.

The information earned a thumbs up. Sabine's sense of humor earned a subscription. Sharing this with my software dev buddies.

If we changed our measurements of time we should ask, to what extent would it influence our experience of it and furthermore we need more square clockface designs

Just discovered Sabine. I love her dead pan humor and style. Being a student of Non Duality (Advaita Vedanta) I find her examples so strikingly similar to the consciousness only model that it helped me understand the notion of consciousness contracting itself via the observer to experience 3rd dimensional reality and how all there is is now and our experience of this now. Thanks

I love the way you tell this and the subtle humor you put in between.

This is the silliest thing ever. Sabine is just one of many who are misguided by the how their own existential conflicts are driving their beliefs and behaviors.

Neither your now nor my now is actually "now". The experienced now can only be a duration. The actual now cannot be observed for certain events must occur before the observed now is registered (reaction, perception, recognition, etc.) and these all take time. The "eternal now" or actual now can have no time at all, for it is sheer potential. Perhaps it's like lightspeed itself. The actual present has no time and no space and only comes to seem to have such once the observation has taken place, yet it has enormous potential energy. (Related to the observer effect that causes the collapse of the wavelength superposition of potential?)

This is a beautiful debrief of Einstein's theory of relativity. I love KZfaq and content creators this is amazing

thank you for simplifying these things. i almost feel like i vaguely see how these things fit toghether

The way I see it, there's two possibilities. Either infinite time exists, or all objects are moving forward, but at different speeds and there must be a "universal" time forward marker

The past does exist but we cannot change it, if we somehow can it turns into a different timeline. We can’t travel into the future because it has not been written/happen. If we can that means somehow we living another life where that future is already written.

Perception is key. Maybe everything is happening simultaneously but we can only perceive in a linear fashion.😊

Every moment exists as its own point time passing over like a film layer giving us the illusion of life

Yes, it is like recording (but multi dimension), like tv show (2 dimension). I think we can watch it over but we cant interact.

When past memories surface, I push it away with a better thought and I keep at it. ❤

Great video Sabine. Thanks for the added perspectives on things.

I very much love your method for explaining things to us. Great job, and keep up the excellent work!

I don't know the IRS seams to hang on the past alot

I love learning about these things and your extremely dry sense of humor made it more enjoyable.

Whenever I think about the past, it just brings back all kinds of memories.

I could listen to Sabine talk about this topic, time and time again.

Light by which we observe objects is always moving so to see something going on time is relative when I fell out of a tree this time when my arm broke is no longer there but it took a long time for the break to heal so the xray that shows the break is a stationary record of an event that if one observed could still be observed if u could find the photons that started at the event.

3:35 I love this supernatural pictures 😂

I love your big ole brain and thank you for adding some humor! I actually think I understood this and that’s bc you did a great job of explaining without too much diversion (which takes my small brain off track and then I can’t get back there.)

I love the joke about Alice agreeing to be friends with you said with such seriousness 😂 Little things like this make this video even more amazing

I saw captain howdy… 3:35

the dry humor is too much for me at midnight. ill try again in the morning and im very much subscribed for life.

I have pre-ordered your book, Sabine. Your first book is simply amazing. A real page-turner. I can hardly wait for your new one to come. Only a few days now!

So happy this came up in my feed. I have always been interested in math, physics, and engineering, but am nowhere near smart enough to have had any success studying it. So happy there are smart people who are able and willing to explain it to dummies like me!

Is this correct? If you travel at light speed for a week, when you stop relative to where you started could be a (?amount) yrs? So for the travel it is a week but when returning to point of origin a million yrs went by?

Absolutely, it only depends where.

There is a huge difference between something actually happening and an observer perceiving it. All observers perceive nonsense that isn't there anymore. Just distorted footprints of the past.

Great explanation and i have to say you are absolutely stone cold with the jokes they are fantastic. Your stoic delivery is delightful. Perfect❤

I had a friend whose name was Sabine too. From Nepal 🇳🇵

So online video games. Response time, ping, latency. Lag. What I see on my screen differs slightly from what my counter players sees on their screens. The position of my character from your perspective. The position of your character from my perspective. Many factors in play. Just thinking and overthinking. But I guess that is how us humans works. We seek answers to questions that we kind of make up ourself. And we find them in calculations.

So, same principle could apply to sound. Someone firing a gun would hear it the moment they pulled the trigger (that observer's "now"). Another person several miles away would hear the same gunshot a few seconds later. The gunshot is in the past, but actually, that event only exists then for that observer.

This video made me go back to an open evening I went to weeks ago with my children at a potential school which had a small farm on site.

I was watching something about quantum entanglements and trying to communicate faster than the speed of light. I don't know quantum mechanics. But how fast does a frequency travel in the frequency domain? She was showing some kind of 1 or 0 step function with quantum entanglements where one is always the opposite but the event itself is random. well I do know that a 1 or 0 would be modeled as a step function in the time domain. But then to solve those kinds of problems you have to use some kind of inner product to put them in the frequency domain where time doesn't make sense, and then it poops out an answer for you when you convert it back. That's how explain it at least. I understand the setting up the equations from physics. but i've never heard anyone explain the la place transform or other transforms pooping out answers. The professors talk about it like they don't understand it. they're just saying stuff. poles, zeros, eigenvalues, matrices, K values, and then it poops out an answer. Then you learn that the math was invented in the 1600 by people sitting alone monastery not even talking to other humans. Everyone gets on youtube trying to b.s. about things faster and slower and usain bolt and olympic medals or something and that's not how it is, and the nazis winning the olympics. If you're thinking about speed you're thinking about velocity and already choosing a direction. That's already an application and not science. You didn't discover anything to apply to create a device where you can intentionally create an event that is faster than time. So experiments that "prove" einsteins theories are correct are not really proofs. it's really an application of his theory. You for example apply a theory on making a prediction of where you will see light after it is bent by a planet. experiments in physics don't really prove anything. You can't prove physics. You can only have mathematical proofs. you can't prove postulates. and you can apply math in physics. You're illustrating an application of the theory of relativity for example with an experiment.

Germans always speak such perfect English with beautiful accents .

I followed your Quantum Mechanics course in Brilliant, it was truly a gem :)

Thank you for this. Your presentation is quite enlightening. As well as entertaining. I love your style, your presentation.

but if we look backward we see that the less amount of time have passed for relativistic observer, so this "no unique" observer holds to strict "now" as information about accelaration is not lost in our frame of reference, but where contradictions with QM pops out ?

And pluck till time and times are done, the Silver Apples of the Moon, the Golden Apples of the Sun. .."The Song of Wandering Aengus." Willuam Butler.

Thank you very, very much for your light-hearted, nicely informative videos AND your collaboration with the brilliant group! I have tried out brilliant, like it, and have recommended it to others.

What an amazingly clear, concise, uncluttered, unmuddled description. You truly are ‘brilliant’!