"I don't think that's what cold is" has a very 'old man yells at clouds' vibe ... I totally dig it!

Hank seems so upbeat lately, like he beat cancer and literally pissed it out of his body or something

Hank, I can't stress how comforting it is to hear a sentence like "its called bla bla bla (hawking radiation) and I DONT understand it" from someone like you. to know even folks on your level have subjects that intimidate them helps to not get discouraged.

"let's see a goose do that" and "i mean go off i guess" are the reason i love Hank's science lessons, he's such a normal guy about them 😂

It's a cold place, but they say it gets colder

Hank: "The Lab is on Earth." Me: "Wow that’s my home!" Hank: "…Lab in Germany…" Me (german) : *falls over*

"He's definitely got that 'I just beat cancer and now I'm doing whatever' energy." - my wife I'm so glad you're okay, Hank. Your work and John's work enriches my life every week, and I'm so grateful for it.

"Sometimes I feel like in the scale of the cosmos we are so clearly insignificant, and sometimes I think there's like, nothing more significant than us" Not sure why but I think this is the most wholesome phrase I've heard in years!

If anyone was curious, the 38 picokelvin was in Bremen, Germany and the 7 terakelvin was in Upton, New York; which are 5,992 kilometers apart.

The OMG particle was much "hotter" than anything we have made in a particle accelerator and that was natrual as far as we know.

This may be my favorite vlogbrothers video. The cut to Hank not having returned the glasses is amazing.

I _knew_ the coldest place was going to be some Earth-bound laboratory, but the phrase "which is not a nebula! It's a... room...." somehow got to me and made it still surprising. +2.7 Kelvin to Hank for always knowing how to convey how reality is still fascinating despite being known!

One of my best friends works in a particle physics lab, where she super cools atoms to percent degrees above absolute zero. I’m so stupidly proud of her and how much she contributes to current research and how fricking smart she is, and I just wanted to gush about my bestie a lil bit

"Let's see a goose do that" is my favorite line of Pizzamas 2023

“I don’t think that’s what cold is, and I am very qualified to say what I think cold is (because it’s what *I* think)” - really digging this rhetorical loophole 😂 …and also digging Hank’s mustache. it’s growing on me.

I accidentally got roped into a thing my coworkers call "fun fact Friday" were every Friday I share a fun fact. Bless you Hank for continually being a source of fun facts for fun fact friday

My favorite part of this video is Hank applying the very human concept of external validation to black holes. Humans and black holes are equally mysterious and equally sensitive to criticism

It’s like what John says. “We are at once far too powerful, and not powerful enough.” He was talking about climate change, but it’s incredible to me that we are literally (and figuratively 😎) the hottest and the coolest ever to have existed anywhere, by far, yet we don’t really know what’s in our own ocean.

“Let’s see a goose do that!” is going to be my go-to phrase now whenever I do something mildly impressive or even routine

This is the most Hank-like video made by Hank in a while. I need more of this. Also, Hank, while the mustache is growing on your face, it is also growing on me. I think you should keep it for a while.

My biggest suggestion for next years Pizzamas, is pajamas. Pajamas are my personality.

Of course there is the possibility of other intelligent life doing similar things, Which only means if we ever find aliens we'll need to ask them what the hottest and coldest temperatures they've made were so we can make sure we're still winning.

Also, I love these unhinged videos with Hank just making a semi sarcastic joke about something every 5 sentences. Love it.

Serious respect for a science educator who can say, "I don't understand it" about anything (Hawking radiation or otherwise). You set a great example, Hank. 😊

“The universe is weird” unlocked a core memory for me, going to my first ever concert, scream singing along to Hank Green and the Perfect Strangers on opening night. Evidence of not only the universe’s weirdness but your pervasive and wonderful presence through my life!

Yes Hank I do indeed talk about, at parties and at office parties, the Boomerang Nebula being the second coldest place in the universe.

This is your best episode yet. I laughed out loud several times. You are a great entertainer. "I don't know what's inside a singularity"

you know, I love that the video length rule went away and I love what's happening on the channel. For many years now I felt like DH&J was the only source of true OG vlogbrothers vibes, and videos almost felt like an obligation. not anymore! y'all are back, big time.

The editing hank coming in to point out that the sunglasses were still there is so ADHD and i have never related to anything more while laughing so much.

Saying "fine, go off" to the _heat death of the universe_ is pretty funny, ngl

"They are like us, both the hottest and coolest thing in the universe" damn that is the best ad reference to the video I've ever heard.

"Sometimes I feel like in the scale of the cosmos we are so clearly insignificant. And other times I think there's nothing more significant than us" wow. both statements beautiful and haunting in their own ways. but hey, congrats us. we set what is likely the universal world record for hottest ever and coldest ever. And, if you think about it, anything you do in your life is something that has likely never been seen before in the long history of the universe. Every thought, feeling, emotion. Others on this rock may have felt them too, but every second of our existence is just affirmation that concepts of love, hope, fear, sadness, uncertainty courage, kindness, empathy, compassion and everything that makes you YOU, will be known and remembered in the great book of Time. The universe will not just remember us for setting the record for hottest ever and coldest ever. But it will also remember us for our ability to love, to care, to teach, to sing, to make art and music and beautiful interpretations of her, this world around us. We are the universe observing itself through the human experience. So take value in your life. You get to be here, after all.

I think Pizza John booty shorts need to exist now, tbh. But more realistically I'd buy pizza joggers or pajama pants.

We need to broadcast this video into a black hole so JWST can study what happens when Hank’s validation crosses the event horizon.

Love that most of this was a very standard “cool thing about our world” vlogbrothers vid but then there was the bit with the sunglasses and the silly ad at the end and it’s just the je ne sais quoi of the Pizzamas magic~

Mentoring precious young adults for decades, I've found that the most glorious magic happens when we feel both insignificantly small and unfathomably large at the very same time. Wether it's experiencing a moonrise over the canyon walks in Moab or the inside curl of a wave as the sun shines in, when it happens you know it, and it's one of the greatest leveling-up experiences this life has to offer.

So much of humans doing science seems like it can be summed up be “what if we did that, but more” and it’s beautiful

i absolutely love when Hank makes an entire video just so he can make a pun in the last line of a video. 10/10

I love that when hank was explaning about cold objects the video got a blue hue like a colder color, and when it was about hot, the video turned yellower. Thank you for giving attention to those little details

So cool. I love that you seem (if possible) more enthusiastic about this stuff than before and I love watching you live through your thought process. I love the happy and quirky vibe. All the best!

God the "substitute science teacher who doesn't have a permanent position because of the drugs" vibes is off the charts in this one. Lovin' it

On the sixth day of Pizzamas Nerdfighters gave to me Six pelicans pelicaning Five Hanklerfish Four corndogs Three French the Llamas Two mustachioed Greens And a terrifying Pizza John Tee

"And i am very qualified to say what i think cold is, because it's what i think." I felt the Brennan lee mulligan in those words

The end of the video is such a delight in every aspect. Most effective advertising I've seen in ages.

Im a physicist who works with dilution refrigerators. 1 Kelvin is considered scorching hot for our work 😁

Hank is so good at making videos explaining science things, and I know that's his job and all, but he's just so good at it. This was funny, and profound, and it had plot twists about the place being Earth, and a cutaway to future Hank and his sunglasses, and I just.. I want to someday be a tiny fraction as good at my job as Hank is at making science explainy videos.

Hank telling the universe "which like, fine, go off" is maybe the best way to experience a Monday. I'm kind of freaking out, because the universe is weird, but Earth is somehow weirder????? #InfiniteUnboundedSets and #HadronizingGlueOnJets

Quite some time ago I read an article about a experiment that managed to create something like -4K. They used laseres to slow down a volume in which they kept some atoms to observe in and looked at how they reacted to being forced not to jitter like something that has kinetic energy, aka heat. They forced the atoms to stop jitter and be effectivly colder than theretically possible.

Moustache Hank is always a surprise these days. You rock it tho

AM I THE ONLY ONE WHO NOTICED THAT THE COLOR TEMPERATURE CHANGED FROM "COOL" TO "WARM" AS HANK WAS TALKING ABOUT THE COLDEST THING AND THE HOTTEST THING? Am I that much of a video editing and filmography nerd that I noticed that?

I got to spend some time in the solid state labs during my physics undergrad, and they were working with Bose-Einstein condensates, made from cesium I believe. This was in the 2003 - 2005 time period. Being a few inches away from one of the coldest things in the universe was pretty cool, even though I was just in the basement of my physics building.

I am just so happy that you are so energetic and you survived the cancer and output so much content and are so joyful! I LOVED you on Dimension 20, I went CRAZY when I saw you there, especially knowing what you went through at the time that it got release. You're such an inspiration for me, I thank you so much!

We are simultaneously the least significant and most significant creatures to have existed ever, as far as we are able to tell. Irredeemable dichotomy unlocked in my psyche. Thanks , Hank for adding a new wrinkle to my already warped brain!

Mustache Hank looks like what the actor who would play Chris Hadfield in a Chris Hadfield biopic would look like

OMG, you are clearly even MORE glad to be alive than before, and it is great to see! Best wishes, Hank, and keep ’em coming.

"and I don't understand it" I absolutely love this! We need more of this in science communication

I love comparing Pizzamas videos to the previous years Pizzamas videos and this years Hank videos look so different to have such similar content

the nerd in my wants to yell "in the KNOWN universe! The measurable universe, Hank! We don't know whats behind the veil between us and the light that can't reach us anymore!!!"

This is one of the more pleasant ways to have an existential crisis

Props to Hank for committing to the bit on the sunglasses gag. Love your work.

Hahaha loved the editing Hank Cameo 😆

Hank, your storytelling is amazing! Despite the video title and despite the introduction of the coldest place, I was still on the edge of my seat to hear where the hottest was and was still blown away that they're both on our blue dot! Remarkable stuff!!

To be clear on the scale of the items we made those temperatures random happenstance could easily create temperature gradients somewhere on the universe colder or hotter than most before they eventually equalize, even inside your own body randomly a single atom could become super super hot or super super cold and technically have the equivalent temperature of anything just because it happened to absorb a lot of energy

I found out about you recently Hank, and now I'm amassing various facts, so that I can play a DND character who uses vaguely threatening facts to achieve various things. The fix is a legend.

This video is so chaotic and mindblowing at the same time i love it

I don't think I will ever understand the capacity of us humans to be the most amazing at everything and then not

This. Is. A. Wonderful. Video. As in, full of WONDER. Thank you, Hank.

Hank your transitions make me so happy :D Please keep doing them!

Can we get a video explaining how they measured such temperatures with such precision?

Seeing you two love each other is amazing.

5:48 "Sometimes, I feel like, on the scale of the cosmos, we are so clearly insignificant. And sometimes, I think, that there's, like, nothing more significant than us. And I'm really not sure which one it is." It's clear that the answer is both. And neither. And that's okay.

With the black holes, it's more so that black hole entropy increases with the surface area of the black hole. Since entropy is inversely related to temperature, you'd thus expect larger black holes to have more entropy and thus a lower temperature. Therefore, the largest black holes are the coldest ones.

The universe might be cooler one day, but it will never be as cold as Hanks mustache

"Fine, go off." - Mustache Hank to the universe

Single best sign off I have EVER heard on a youtube video. "Get these shirts because like us they are the hottest and the coolest thing in the universe". *chef's kiss

This video was PEAK Hank, and I am loving it.

Why can’t we be both insignificant and the most significant? I mean we already nailed the paradox of being the hottest and the coldest.

Have to say, the vibe of mostly bald mustache Hank talking about hot and cold things has a manic energy that I am here for.

I feel like you can see the aura of Hank's joie de vivre this Pizzamas

I think the emergent features bring your theory into question. When the temperatures inside a super nova are estimated they are probably focusing on the over all region or the amount of energy necessary for the event to take place and not necessarily the maximum or minimum temperature at any given region in the space where a super nova is taking place. Unknown phenomena there or in other places probably do make comparable temperatures that we simply can't detect.

Unless, of course, some alien civilization is out there also preforming these kinds of experiments. Still, we can make things happen that would never happen on their own. And that is something to proud of.

No, Hank _with a moustache_ is both the hottest and coolest thing in the universe.

Two things: 1) The temperature of black holes is NOT determined by dividing by the mass of the black hole. It is determined (theoretically) by the curve of spectrum of the black body radiation which correlates with (or perhaps defines) temperature. Yes, this is figured out by an equation which includes an inverse relationship with mass, but that isn't dividing the temperature in any sense, just a few physical constants, the ratio of the circumference of a circle to its diameter, and 8. 2) If you are going to measure temperature by the speed of single particles, than the fastest particles are NOT in our accelerators, they are in cosmic radiation.

Hank's mustache and short hair are giving me some Colonel Chris Hadfield vibes. Especially since he's so enthusiastically talking about space. I love it!

The answer is laboratories????? I was NOT expecting that

Hank, you can't just release a video on 2 channels at once. I don't own two brains

You presuming a singularity's mental state strikes comically close to the philisophical core of my novel in progress... I felt weirdly seen.❤

My undergrad thesis was about quantum reflection of atoms at nanoKelvin temperatures, in which they don't melt (!) when coming into contact with room temperature surfaces but rather...bounce off. My professor described it as "expecting a snowball to stay frozen in the centre of the sun."

The cold places in my life are made better by Hank and John, nerdfighteria, and especially, pizzajohn.

Being cool and nerdy at the same time... is talent my friends 💪

5:48 - 6:00 Without contradiction, it's both, simultaneously.

I can tell you've been working on stand up, because you are getting funnier and funnier! The last two videos you made literally made me lol all alone.

Okay, but could we get pizzamas pajama pants next year? 👀

Have there been Pizzamas bookmarks? I think that would be a great thing to have 🔖📚! I'm thinking of this because my daughter started reading An Absolutely Remarkable Thing and is using a TFIOS bookmark 😊

I don't remember how to do it but there's actually a fairly straightforward way to calculate the entropy of a black hole (maybe just for a chargeless/non-rotating black hole), and you can get a temperature from that (temperature is actually always defined in terms of entropy). And that temperature is really low. IIRC hawking radiation does end up looking like thermal radiation and you could probably get a temperature from the spectrum, but we've never actually observed Hawking radiation (because it's really weak). I wouldn't be surprised if the temperature you get from the theoretical amount of hawking radiation actually agrees with the entropy calculation though.

This is a properly top tier vlogbrothers video, just it's so aggressively Hank, I love it so much

I demand for there to be sweat pants with “PIZZA JOHN” or “PIZZA” or even just the Pizza John face on the booty for next year

The best way to live with chronic forgetfulness is to predict your behaviour. You did great 🕶️🕶️

I appreciate the subtle goose shade hank 2:05

goodness I forgot how terrifyingly BEAUTIFUL black holes are. makes me want to paint on a giant canvas