Hey, so something worth knowing is a benefit for the nonprofit organization that makes Crash Course and SciShow Complexly. It's September 16th, 2026 in Los Angeles, California at the Wilshire Ebell Theater. Please join us. It's going to be incredible.
Friends of Complexly like Mark Rober, Katie Max, Simone Yech, and Moore will share inspiring talks about what makes them hopeful and join Hank Green on stage for fun, interactive discussions. Complexly has been creating free educational content like SciShow and PBS eons and Crash Course and Bizarre Beasts for nearly 15 years and 6 billion views. But this year, we have become a 501c3 nonprofit and we're doing something worth knowing as an in-person event that benefits Complexly and our impactful educational media. It's the first ever Complexly in-person event and it's a fundraiser to support our mission of inspiring curiosity and lowering barriers to knowledge building because curiosity builds understanding and understanding builds a better world.
Tickets to the general public June 30th at somethingworthknowing.com. So come build a better world with us on September 16th and experience something worth knowing you can get your ticket at Complexly.info slash something. Hello and welcome the Dear Hank and John. Doors I prefer to think of it Dear John and Hank.
It's a weekly podcast where I Hank Green and my brother John answer your questions and give you the advice and bring you all of the weeks news from both Mars and AFC Wimbledon. But first John, you have a phone for us. I do have a phone this morning but I thought we could start by just talking about how we're doing. How are you?
Oh I'm okay my refrigerator still isn't running so I want to make a video on how to deal with your refrigerator stopping working because apparently it is not an easy problem to fix. Well here's a broad observation Hank and I hope that you don't take this too personally but for 249,850 of the 250,000 years that humans have been on this earth they haven't had refrigerators and we've done just fine as a species so maybe you need to suck it up. Ah fine. Do you want to tell me how you're doing?
I'm doing great. Things are good here. My five-year-old son has just started school and it's so cute with the backpack and and his little school uniform and everything. It's just adorable.
Yes I couldn't be happier. It's a beautiful summer here in Indianapolis. The White River is at its very very finest. Life is good and here is a poem by Emily Dickinson.
Tell All the Truth but tell it's slant. Tell All the Truth but tell it's slant success in circuit lies to bright for our infirm to white the truth superb surprise. As lightning to the children eased with explanation kind the truth must dazzle gradually or every man be blind. I love this poem but I also don't know what it means and I've loved it for a long time and I've felt torn in two directions about it for the longest time because one of the things that's interesting about Dickinson's poetry is the sort of waxing and waning relationship that she has with religious faith and with the idea of the soul and I feel in this poem there is both the waxing and the waning and I can handle one poem waxing and another waning but I'm not sure that I can handle waxing and waning within the same poem but I love that line tell All the Truth but tell it's slant I think it is a really really good piece of advice when it comes to telling stories and also when it comes to writing.
So that's that's today's poem. I very rarely know what to think about poems John. Emily Dickinson in particular is something that was that was forced upon me in high school and I was like this is clearly just somebody who put a bunch of words down in an order that to them and to us is completely arbitrary and I need I need you to give to teach me how to feel things about these words that are clearly meant to say something but are so afraid of actually saying it. Well the problem with saying things directly I mean that's you know that's a reasonable criticism of of many poems and many works of literature but the problem with saying something directly is that you end up saying it less effectively right like let me submit that if you just say there is a certain tension between innocence and experience and adolescence that leads to a simultaneous like thrill of the new and feeling of loss about one's childhood that one can never get back like that isn't that doesn't hit you in the middle you can't identify with that it doesn't feel as transformative as like reading about Holden Caufield experiencing those emotions so I think that there is something about language that can be like transformative and helpful in a way that just quote unquote saying something isn't but yeah so I mean that's that's what Emily Dickinson is saying I think when she says tell All the Truth but tell it slant you know we can't if we just say the thing directly a lot of times it isn't as impactful it isn't as as moving and important to us should we move on to questions or do you want to continue well I want to talk about poetry is that okay okay yeah absolutely just for a little bit I will I will also submit that you know like there there's a both a problem and a solution in the way that I feel like poetry operates the the the solution is that it's giving us an opportunity to think it's kind of a it's a prompt wherein like it's not saying here's the thing to think it's saying here is something that will make you think and I appreciate that I appreciate I love things that make me think and I think you know by not being all upfront and being you know 100 percent this is the thing that I'm trying to say that gives you the opportunity to fill it in the problem that that that solution also causes is that it doesn't truly function unless it sort of relies on the writer and the writer to have come from a similar place in in that you know these well not necessarily I think I think that it relies on them having come from a similar place if the reader is going to get with the writer intended for them to get well yes and no I mean look a reader and a writer have to work in collaboration and a reader has to do their job just as the writer has to do their job but like let me give you the example of the Adventures of Huckleberry Finn the great American novel written by Mark Twain you know like there is a there is a right way and a wrong way to read that novel it's it's not just it doesn't just exist to make you think it exists to make you understand some of the reasons that that slavery is so unjust and that's sort of like a demented moral conscience across a social order can lead to people believing that virtue is sin and sin is virtue like that's that's not trying to like make you think it's trying to make an argument that that will you know will change your belief system or or affirm your understanding of humanity or challenge it and I think like that that the idea that like you know all readings of a story or a poem are equally valuable or there are no wrong answers in literature like there are in science like I just dismissed that completely I think that you know I think that authorial intent isn't particularly important but meaning is and there are better and worse readings of a text and it's just like science in the sense that our responsibility as as readers is to try to try to get to whatever truth might be inside a work of art yeah I feel yeah and in the case of a novel I would understand it much more of like the you know the amount of information that allows for a more solid interpretation but I think the economy of words in poetry and also the you know the intent of it being a little bit you know like leaving room there for the for the reader to be a part of the work it in a way it I feel like without you know participating in Emily Dickinson's culture I would have a very difficult time understanding what Emily Dickinson's work meant no I mean it's right there in the text like you know as lightning to the children eased with explanation kind like you know we don't tell young children like you know lightning is this terrifying bolt of electricity from the sky that will kill you we're like oh listen to the you know look at the beautiful lightning and then here the big thunder you know and her argument here is right in the last two lines of the poem the truth must dazzle gradually or every man be blind like if somehow you know the secrets of the universe and of God and the soul were revealed to us all at once that like this that truth would be blinding now I don't agree with the argument of the poem necessarily but like I think there is a reading of it like I don't think that it's like that hard is I don't think it's like a matter of like you know needing to understand you know what kind of house Emily Dickinson grew up in or like what color clothing she wore I think it's it was usually white for the record but I think you know I think like the poem can stand on its own now not all poems can stand on their own but I think that one can can we get to the questions I think that's probably a good idea all right this question is from Ellie she writes dear John and Hank my name is Ellie and I've been a nerd fighter for over two years my question to you is do you think there is a possibility of there being different universes do you believe in the multiverse theory now I am not a scientist Ellie so I'm going to answer this question first and then I'm going to let Hank who actually has information related to the subject answer it I totally believe in the multiverse theory I believe that there is a universe in which every possible thing that could have happened happens where like a butterfly flap its wings this way in one universe and that way in another universe and that in and of itself made a different universe and there is this like nearly well I don't know if you can really say nearly infinite because infinity isn't a big number but there's this like countless you know gajillions of universes out there and in each of them interestingly Donald Trump does not become president this is a conversation John and I have previously had that if there is a possibility that that all all things could happen even even in that that infinite sphere in none of them does Donald Trump win the republican nomination for president actually I think there's two of them and yet we continue talking about it no I think there's two of them out of the like 14 quadrillion possibilities I think there are two in which he gets the nomination but in neither of those two to see become president and in one of the two where he gets the nomination my understanding is that there is an asteroid that hits the earth that results in there only being 17 Americans left but he still loses to Samuel who was a manager at a meat processing plant but wins you know the majority of the vote he actually wins 16 to one in the end so Ellie from to talk about this in a more scientific way it's there's this idea of believing in a scientific theory is sort of imagining the way that science works incorrectly so I think that sometimes we want there to be a world that we can you know just like kind of decide how we want to see the world and I think that we should and can do that when it comes to to personal but when it comes to the multiverse and the universe we don't really get to decide what we believe in there is a way that it is and we don't know so we don't know whether there's a multiverse or not we have people who have proposed it because there is complicated math that I do not and do not want to understand and they get they have they have that argument and and they will continue to have those arguments for probably a very long time until until someday in which they can say with relative certainty that one or the other thing is true and then we will continue on our path learning more about how how the universe functions but but is it possible Hank that there is this like nearly infinite set of universes and that everything that happens in the universe creates a new one yeah yeah I mean when you start talking cosmologically a lot of things are possible first of all but yeah I mean it's definitely I think that that has been proposed and and has been worked on and and in the way that cosmologists and physicists deal with these things it has been it has been scrutinized but it is a very difficult thing to scrutinize because at the point where we are talking about the universe in terms of equations and in terms of what we observe it is a weird weird thing when it all boils down to math wow this question is from Maggie who asks dear Hank and John if you could have any three languages instantly downloaded into your brain which would they be and why well from my perspective it'd be very helpful to have English all of English immediately there's so many English words that I need when I'm writing that I find it difficult to access or remember or like I'm trying to use my brain as a thesaurus and it isn't working so I would start with English second would be Spanish a lot of Spanish speakers in my life and I think it would be fun to be able to speak Spanish also I really like this this NPR show my friend Daniel Arricone makes called Radio Ambulante but I can't listen to it the Spanish parts because I don't speak Spanish and then the third would be Mandarin because I I believe that you know obviously that would be very useful if we could make Crash Course World History videos in Mandarin Spanish and English instead of just English so those would be my three yeah I think I probably just picked the three most commonly spoken languages that weren't English I would not just try and get more English because I feel like I'm pretty good there but yeah giant Mandarin Hindi and Spanish I believe the three most spoken languages English is in the top the top four as well so I think you want to know the top five spoken languages Hank are my wrong Mandarin Spanish English Hindi and do you have a guess uh no I have no idea it's actually minion what minion like that like the little yellow thing yeah minion is fifth it's actually Arabic that was more of a joke for my son than a joke for you but I enjoyed it greatly you know what weird the weird thing about minions have you noticed this that like minions are loved by children and women over 65 I'm not sure that minions are loved by women over 65 I don't think there's anyone over the age of nine who really loves a minion right now no no it's crazy it's I I was just at a wedding shower at a so my friend has a friend who is in her 60s and her house is covered in minions covered and she she has amazing she's an artist she's a she's an amazing watercolorist and she does really beautiful textile art and she is really intelligent wonderful woman and she's obsessed with minions and when you look when the minions movie was first announced there was a you know the trailer got shared on Facebook and it was just oh all comments from people in their 60s being like well I know this is for kids but I'll tell you what they sure I can't wait they love it they it's so strange we should talk to mom about it and be like mom do you end a minion I don't think she is but maybe she would be I don't know it's weird I really think respectfully that you found one person who happens to like minions it happens to be a woman over 60 and you made a very broad conclusion let's take another question Hank this one's from River dear john and hank I've watched the world cup for a long time now I want to start following the game full time but I don't know where to start because it's very confusing I chose Chelsea initially because I liked the name but well I was put off from them soon after presumably because they were built from the blood of actual Russian peasants anyway any tips for the beginner soccer foul or how do you choose your team well river it's not easy but you choose AFC Wimbledon and then you realize that you can't watch AFC Wimbledon weekend because they play in the fourth year of English football so you choose the other great club in England Liverpool football club it's that easy river done and dusted there's also a question for you Hank will you be in season two of that thing you're doing with Wil Wheaton I will be and so will Ankia and Jeremy if you're if you're aware of what we're talking about I did a show called Titans Grave the ashes of Velkana with Wil Wheaton and some friends in which we play the highest production value session of a tabletop RPG that you've ever seen so it's like Dungeons and Dragons if you've heard of that but it's not Dungeons and Dragons where we we take on the role of characters and and fight evil it's real fun and real good and real funny and I just went to the subreddit reddit.com slash r slash forwards from grandma and it is full of minions sorry John are you serious yes but like wait it's it's reddit slash r slash what forwards from grandma I'm gonna look because I don't believe wow that's a lot of minions goodness gracious let's move on to another question this one's from Briana who writes deer John and Hank salutations my name is Briana and I fell out of a tree today I was climbing the tree then I slipped and was in a position where I could either fall on my knees or jump and land on my feet I chose the ladder but I was barefoot because I find shoes rather cumbersome and so I landed on the sidewalk and then stumbled a few steps and curled into a panting heap for a few minutes some people drove by and looked concerned so I decided I had to get up so that no one called an ambulance because I was fine just shaken once I got up it felt like my body no longer trusted my mind's decision so I couldn't run but I also couldn't stop moving now I'm realizing that the story is too long my question is what tree climbing advice can you give you because I rather like climbing trees this is my favorite question we've ever got that's really a good question Briana um I have to say I'm not I'm not a super expert it sounds like you may know a good deal more about cleatram and tree climbing than I am a little confused as to why Briana reached out to deer Hank and John or as I prefer to think of it dear John and Hank for tree climbing advice when she seems to be the world's leading tree climber yeah I guess the first thing I'd say Briana is uh when I set out to climb a tree um even though I do find shoes rather cumbersome at times I put them on um so that's my number one piece of advice where's some shoes yeah your ancestors were barefoot for so long and they worked so hard to make shoes possible for you over generations and generations they they toiled so that you could have shoes when you climb trees whereas they could not um so wear shoes that's actually my main piece of advice other than that it seems to me that you're an expert tree climber yeah I mean I'm very glad that you didn't fall on your knees because that would have been very bad uh knees are not designed for being fallen on feet are and uh yeah Hank how tall do you suppose this tree was where she was able to land and be unhurt I feel like if I fell from a tree that was three or four feet above the ground I would definitely break a leg you could fall from higher than that it turns out and be all right mmm maybe you can I'm old you get you start getting into trouble once you get up over 10 10 feet or so where you're pretty guaranteed to have to have a broken bone or two Hank sometimes you say things and you say them very authoritatively in the way that you always say things and um I can't decide if you actually know all these things or if you just have a gift for having a voice that sounds like you know things like is 10 feet actually like the distance at which injuries become far more likely or are you just a confident liar okay we have another question this one is from Reed who asks steer Hank and John do fish sleep if they do sleep what do you think fish dream about any ideas John Hank I know that there's nothing more boring than other people's dreams but can I tell you about my dream anyway I dreamt last night that I was imprisoned with Sarah my beautiful wife we were both imprisoned and we were trying to find a way for one of us to escape because our children were on the loose they were having to take care of each other and I love my five-year-old son very much and he's an incredibly good big brother but he is unqualified to take care of Alice oh it may be very anxious anyway I think when fish sleep they they have anxiety dreams just like the dream of sharks and of being eaten they dream of the world without them which will indeed be the world soon enough oh fish will be okay there's a lot of ocean well not all of them will be okay but I think I think most of the fish will be all right um Hank yes Hank what Hank what none of them will be okay none of the fish will be okay they are all going to die every fish every moment it's swimming knows that oblivion is coming right each individual fish will die yes and then eventually all of the fish will die and there will be no life on earth all right let's give me to get back to the original question which is about whether or not fish sleep do they not really fish do not have eye eyelids so they don't they can't close their eyes like like we would when sleeping they also don't do the thing that we do when we sleep which is that we like power down parts of our brains and like our brain enters into a new a new way of operating their brains aren't really that complex like they're not super complicated fish brains um so they don't really do that they do some fish like rest they have resting periods but it doesn't seem to be that it is that it is it's more of a physical rest than it is a mental uh a alteration in the mental state the way that sleep is for us so fish don't really sleep no and they don't and and because of that they don't dream wow which is interesting so fish don't dream about sharks yeah they don't dream yeah they don't they don't they don't have anxiety dreams what a lovely what a lovely thing do you think fish feel anxious though because i feel like they do like when i uh when i see fish i always feel like they're super anxious probably i imagine that uh that all prey animals uh have some kind of anxiety based instinct let me ask a follow up question Hank would you consider humans to be a uh prey animal no then why do i have so much anxiety i will we yeah i think that we certainly are related to prey animals we're closely related to prey animals and uh and also i i think that there are a lot you know i guess you don't have to be a prey animal to experience anxiety there are lots of things to be anxious about that aren't death um and and you know being consumed so i think that even if it's you know you're wait wait wait wait whoa whoa whoa whoa backup backup there are other things to be anxious about i've been devoting so much time to being anxious about death that i didn't even know but what are these other things that i need to be worrying about please list them immediately you know uh social standing uh uh mates is one of the primary things that humans and other animals are anxious about uh so you know finding and securing uh someone to procreate with and also who will love you for being you oh i quite like my mate and i'm reasonably happy with my social standing so that's a big relief so can i just focus on death is that okay yeah that's fine i mean that's actually like a sign that you're doing pretty good if you're if you know you're focused on on the you know the sort of most inevitable and unavoidable uh problem that we all face that's good that's fine you know that means that you're you've handled the more uh the more handleable ones good job today's episode of deer hankajan is brought to you by the fear of death the best fear according to hank today's episode of deer hankajan is brought to you by feet ah you do not need to wear shoes on your feet because of how cumbersome they are if you are climbing trees but maybe you should anyway just for safety's sake today's episode of deer hankajan is brought to you by grandma who wants you to know that the minions movie will be out on dvd soon today's episode of deer hankajan is brought to you by the multiverse theory completely unconcerned with whether or not you believe it this episode of deer hankajan is brought to you by shopify there are a lot of things that stand between i have an idea and this is an idea that actually exists in the world and people are buying things from me and that is what shopify makes easier when you start with shopify the tools to design and launch and take payments they're all there from day one you don't have to build a whole machine before you can start building the business and this is important because you also have to like look good and with shopify's templates you could get a site set up really quick that looks credible and professional without needing to code or duct tape a bunch of different tools together and when things look real that works on my brain to be like i'm doing a real thing it also works on other brains to be like this is legitimate shopify also has one of the best check out systems on the internet it's built to help customers finish the purchase effectively and efficiently without a bunch of roadblocks returning customers can check out with a single click that means less friction and fewer abandoned carts and a smoother experience for everybody that stuff gives you confidence early on and it gives other people confidence in what you're doing you're not wondering whether the payment system is going to work you're not wondering whether customers can get through the process shopify handles that foundation so you can focus on the thing that you're actually trying to do it's really kind of amazing to me the shopify is a tool that works from the first day your store launches when you're just starting to get customers all the way up to being the size of good dot store or dftba dot com or being the size of like matel and gymshark when you build a shopify you're building with tools that already work at every scale all you need is the idea shopify handles the rest you can start your free trial at shopify dot com slash deer hank start your free trial shopify dot com slash deer hank with new subscription only while supplies last until September 27th 2026 see website for more details one thing i love about summary is how easy everything feels the days are a little more relaxed my kids don't have to wake up at five in the morning and i find myself reaching for the same comfortable go anywhere pieces again and again which is why i keep coming back to quince i often wear either a long sleeve or a short sleeve button down from quince and it fits well and i never have any complaints in fact sometimes i get compliments about it i was at the airport a couple days ago i often find myself in airports and someone said i like your shirt and i said thanks it's from quince quince's 100 european linen pants and shirts are breathable easy to throw on in the summer upgrade your rotation needs starting at just 34 dollars their teas are soft enough to live in all day and the lightweight cotton sweaters are exactly what you want when those summer nights cool down so that's why i'm wearing quince this summer and you can make your summer wardrobe easier by going to quince dot com slash deer hank for free shipping on your order and 365 day returns now available in Canada too that's qunce.com for free shipping and 365 day returns quince.com.
This episode of Dear Hank and John is brought to you by Factor. Imagine for a moment that you are absolutely immersed in some work where you're creating something beautiful or useful or useless and ugly but you love it anyway and you look up and suddenly you have a feeling and that feeling is that it is 2.30 pm and you did not eat lunch what are you going to do are you going to get meal delivery that's going to cost too much and maybe be a bit of a mistake or are you going to go to the cupboard and just eat several fishfolds of peanuts those are my two choices unless i have a factor in the fridge you can get smoky barbecue chicken breast with potato mash cream corn and peppers you can get creamy lemon pepper chicken with veggie rice peel off broccoli and carrots this has the fiber I need it has the protein I need and it has the deliciousness I need what about garlic herb roasted barramundi with potato zucchini and burr blanc sauce I don't really know what that means but it sounds delicious what about a black bean taco bowl with corn salsa and cilantro crema a delicious high fiber high protein meal that no animals had to die for any of those can be ready in two minutes fresh never frozen over a hundred rotating weekly meals including globally inspired flavors like Mediterranean and Asian factor shops perhaps cooks and delivers straight to your door so you have more time for everything you love this spring head to factor meals dot com slash deer hank 50 off and use the code deer hank 50 off to get 50 off and free daily greens per box with new subscription only wild supplies last until September 27th 2026 see website for more details all right Hank just a couple more quick questions before we get to the all important news from AFC Wimbledon and I guess also the news from Mars this question is from Klaus who is from Germany and who asks deer John and Hank how would you go about implementing the metric system in North America let me answer this question first because I happen to know that Hank is a delusional fan of the metric system because he believes in base 10 numbers instead of that sweet sweet base 12 that we have here in the United States with our 12 inch feet and our 12 feet per square meter um Hank is that correct you just made me that was like a super cringe um so let me answer your question with a question Klaus why on earth would we adopt the metric system here in the great United States of America when we already have an excellent system of measuring distances there are 12 inches in a foot there are three feet in a yard and there are 5,280 feet in a mile could it be any simpler the answer my friend is no well uh class asks the question and uh if you think we should actually answer it instead of being intentionally obtuse we could do that I wasn't being intentionally obtuse I'd like that there are 5,280 feet in a mile I find it so much easier to remember than the number of meters in a kilo meter Klaus I will answer your question by just saying that it is indeed difficult and I do not want to like be too angry at America for not having converted to the metric system because it is a big uh and and diverse country with a lot of needs and a lot of uh a lot of systems that have been put in place and uh would be very difficult to to change from uh and it's a it's a big country it goes all the way from one side of the continent to the other and we are also very powerful and there's a lot of efficiency in that power and we can say like well we would change except that everybody else is completely willing to uh to to deal with our weird system of measurement so that they can do business with us so why would we when it's gonna cost us money and effort and annoyance to change so there are good reasons why America doesn't change to the metric system uh but they are not uh they are they are practical reasons that have to do with economics and with efficiency they are not uh they are not reasons that have to do with uh just how how much more efficient the whole world would be if everybody used the same units uh we are uh not in a perfectly global society and so we do not function as a global society we function as a unit of the United States and we say well it's about us being more efficient uh dealing and doing this using the systems we've always used not about the whole world being more efficient trying to get all on one system of measurement which would be obviously not the system of measurement we use and even Americans recognize that we don't want the rest of the world to use our stupid system but we uh we have a hard time switching because we have a lot invested into our current stupid system so I really don't know and I don't think it's gonna happen uh you know in the short term in the next 30 years I doubt we will we will shift the metric system I I would love for it to happen and uh science has largely shifted to the metric system I you know use metric uh measures for weight and distance myself but I don't for temperature because that just is very confusing to me and uh yeah I I think that I also think that it's perfectly reasonable and possible to be a two system country and we kind of are you know we function in both so that was a long answer to class is a very short question uh in which I didn't actually answer the question because I don't think that we are going to do it I think we'll do it but I think we'll do it when we become less powerful on the global stage and so that it makes more sense for us to do it because we're losing you know real measurable benefit from not doing it um but I will say that I think it will be a sad day it will be a very sad day because um you know how are we gonna know how far it is from Los Angeles to New York you know we won't even be able to calculate that anymore distance will just be a thing that we have to estimate using um you know like oh it's about 400,000 human heads between Los Angeles and New York that'll be the only way that we'll have of measuring distance is just the approximate width of the adult human head I want to know how close you actually were to the the real distance 400,000 human heads is that way a butt way too much or way too few or roughly correct I'm gonna do that math oh well Hank first off it depends if you're talking about the width or the length of a human head because they aren't perfectly circular so um I'm sure someone is going to figure that out for me but I'm gonna guess that I nailed it um based on everything I know about myself Hank it's time for the news from Mars a cold dead rock further from the earth than the sun that has no atmosphere to speak of um and also the news from AFC Wimbledon the most exciting fan owned football club in the world and arguably the greatest institution that human beings have ever come together to produce what's the news from Mars this week well and the news I'm sorry I was doing math I mean Hank I got it exactly right it's not hard just trust me I know the width of a human head sorry I'm still doing math just a second you are off by a lot incorrect you've measured the human head poorly but it's amazing you would think that 400,000 human heads laid laid side by side in any orientation would be a long way but it's actually in on the order of uh you know about 100 to 200 miles no way okay let's move on to the news uh from from Mars John is that all right with you yes please let's okay uh this uh week NASA tested one of the oh not one of the the most powerful rocket engine ever developed one of the most efficient rocket engines ever developed as well uh which will be used on the space launch system which will propel uh American astronauts once again into space as we move beyond the era where we are piggybacking on our on the rockets of our Russian friends and uh the the engines are uh meant for single use they are they are crazy like they're they're basically built to uh work you know they're single use engines so you light them off and they rock it uh that was not meant to be upon they rock it so hard that they basically you know are pretty close to the danger zone in terms of engineering and failure but that allows them to be very efficient by having so much thrust they have a very good thrust to weight ratio these are the RS-25 engines um and we uh we just did sort of a final test that NASA did a final test where they they ran one of these engines on the ground and not attached to a actual space vehicle and uh and it went very well and these will be the engines if we ever take humans to Mars they will likely be the engines that do it i'd like to slightly adjust my estimate for the number of human heads between Los Angeles and New York um from 400 000 to 40 000 um because i think that 400 000 is about uh 30 miles or 35 miles but i think 40 000 is darn near perfect uh it's just a quick 40 000 000 head plane ride from Los Angeles to New York City i'm sorry what was the news for Mars you guys built a rocket it's super fast it's a really great rocket it's like it's the it's the the the Ferrari of rocket engines john it's gonna it's gonna get us to Mars way faster and it's gonna make really loud noises and a lot of fire that's really exciting congratulations on your new rocket hey AFC Wimbledon won their first game of the season they came from one-nil down against Crawley Town and won the game two-to-one the first goal of the season for AFC Wimbledon was scored of course by the beast out of bio-akin-fenwa the player i love above all others at least among current players in he's the biggest strongest toughest English football player and he's got DFTBA on his shorts um both of the first two home games unfortunately have resulted in losses so from three games AFC Wimbledon has just three points that's not enough we need to start doing better soon but the John Green Sand has sold out in each of the first two games so that's something but yeah one-game two-to-one you know they say Hank one-nil down to two-one up that's the way we're gonna get promoted to lead one so it's very exciting i i'm hopeful about the season but but of course a little nervous about our start here just three points from the first three games and that's the news from AFC Wimbledon what a wonderful time in your history John i'm excited for you that's nice you did a good job of faking it i do my best because what you feel is completely valid i feel the same way about what you feel but just less so oh John okay so what did we learn today we learned that you should probably wear shoes when you're climbing a tree and we learned that apparently grandmothers love minions the fifth most popular language spoken in the world today we also learned that John would rather learn English than a language that would allow him to talk to hundreds of millions of people i'm just trying to become a better writer Hank and of course we learned thanks to Ellie that there may or may not be a multiverse but regardless the multiverse doesn't care if we believe in it and in one of those universes John in one of those universes AFC Wimbledon just won the World Cup nope actually they didn't in none of those universes because AFC Wimbledon could never possibly compete in the World Cup because they are not an independent nation but in one of those universes and one of those universes they are they are an independent nation just that little town it's like the Vatican and then they win the World Cup that was great and i want to thank everybody for for listening to this episode of your Hank and John also thanks for submitting your questions which you can continue to do at Hank and John at gmail.com we'll endeavor to answer as many as possible in future podcasts our theme music is from Gunnarola this podcast is edited by Nicholas Jenkins we are John and Hank Green and as they say in our hometown don't forget to be awesome