kottke.org posts about video
In this video, rollercoaster engineer Korey Kiepert talks about all the different types of rollercoasters that you’ll see at an amusement park, including wooden, terrain, launched, hyper, out-and-back, and wild mouse coasters.
So, when we design a roller coaster, we’re trying to take something that’s very much driven by the same codes that would be used to design a building. And we’re working with those to create something that gives you the illusion that it’s daring and adventurous but, at the same time, it’s all very controlled.
See also Every Bridge For Every Situation, Explained by an Engineer. (via the kid should see this)
For this video, the NY Times talked to several people from around the world (Britain, Zimbabwe, Norway, India, etc.) about what they think about how the United States is approaching climate change and other environmental challenges. Spoiler alert: there is a lot of incredulity about how shitty America is doing in this area. And that matters because what happens here affects everyone around the world.
See also What Does U.S. Health Care Look Like Abroad? and What Do U.S. Elections Look Like Abroad?
Singer and actor Leslie Odom Jr., who grew up in Philadelphia and who you may know from Hamilton and who is wearing an amazing purple sweater in this video, breaks down some Philly slang for us, including jawn, Mummers, MAC machine, old head, water ice, and outta pocket.
Before I clicked play on the video embedded above of 1000 musicians playing Learn to Fly by the Foo Fighters, I assumed it was going to be kind of a mess, a muddled wall of sound. Instead, I was surprised to hear something almost magical, a rock anthem played with the fullness of a orchestra or chorus, the band and the crowd merged into a single, gorgeously layered entity. I was moved by it, almost immediately. All those drummers pounding away on their drum kits in unison! You can check out this playlist for more 1000 musician versions of rock songs, including Seven Nation Army (White Stripes), We Will Rock You (Queen), and Smells Like Teen Spirit (Nirvana):
I also have to say that these videos hit me harder now, 15 months into a global pandemic that kept my family and I separated from all but a narrow slice of the world, than they would have before, especially now that things are starting to loosen up a bit and I am able to safely socialize with other vaccinated folks in person. Seeing thousands of people collectively engaged something so joyful is both a reminder of what we lost during the pandemic and what we stand to gain if we can manage to contain the virus worldwide. I think this is the reason why this video of a flash mob performing Ode to Joy went viral early on in the pandemic. All the feels. (another great find via openculture)
How do you know what to do with your life? The introduction to this new and uncharacteristically existential Kurzgesagt video is some real truth:
Wrapping your mind around your life is pretty hard, because you are up to your neck in it. It’s like trying to understand the ocean while learning how to swim. On most days you are busy just keeping your head above water. So it is not easy to figure out what to do with your life and how to spend your time. There are a million distractions. Your family, friends and romantic partners, boring work, and exciting projects. Video games to play and books to read. And then there is your couch that somebody needs to lie on. It’s easy to get lost.
Thinking about this stuff can be kind of a downer, as the writer of this video admits in a comment:
It’s so easy to get lost in your daily life: there are so many “urgent” and “annoying” things that you forget that actually every day is special, sort of. And even more so the days we have with friends and family. I know watching a video like this can hit pretty hard. But at least for me, the message it tries to convey does make me actually change my behavior. Reprioritize things. You know. Hope it had a similar effect for some of you.
See also Your Life in Weeks by Tim Urban.
After watching this short film on how much data private companies are able to gather about you (data that we willingly give them in some cases), you might be forgiven for thinking that, never mind some far flung future, we are living in a full-on dystopia right now. The set design, the acting, the positioning of the tables, the see-through table tops, the laptop vs. notebook…this was really well done. When the interrogator got up from his desk, I viscerally felt the invasion of privacy.
World-renowned magician David Berglas, now 94 years old, does a card trick that’s so effortlessly simple and dazzling that no one has figured it out and Berglas himself says it cannot be taught.
The trick is a version of a classic plot of magic, called Any Card at Any Number. These tricks are called ACAAN in the business.
ACAAN has been around since the 1700s, and every iteration unfolds in roughly the same way: A spectator is asked to name any card in a deck β let’s say the nine of clubs. Another is asked to name any number between one and 52 β let’s say 31.
The cards are dealt face up, one by one. The 31st card revealed is, of course, the nine of clubs. Cue the gasps.
There are hundreds of ACAAN variations, and you’d be hard pressed to find a professional card magician without at least one in his or her repertoire. (A Buddha-like maestro in Spain, Dani DaOrtiz, knows about 60.) There are ACAANs in which the card-choosing spectator writes down the named card in secrecy; ACAANs in which the spectator shuffles the deck; ACAANs in which every other card turns out to be blank.
For all their differences, every ACAAN has one feature in common: At some point, the magician touches the cards. The touch might be imperceptible, it might appear entirely innocent. But the cards are always touched.
With one exception: David Berglas’s ACAAN. He would place the cards on a table and he didn’t handle them again until after the revelation and during the applause. There was no sleight of hand, no hint of shenanigans. It was both effortless and boggling.
Of course, his unwillingness to reveal how the trick works or even that he is unable to show someone else how to do it could be part of the trick. But in recent years, Berglas has pulled back the curtain on most of his other tricks, like the time he made a grand piano vanish into thin air, explained by Berglas himself in a YouTube video:
But not this card trick, as the author of the Times’ piece discovers. A delightful read.
Update: Part of the reason I love publishing posts like this (about magic and unknowable tricks) is that I know I’m gonna get some great feedback. In 2011, Richard Kaufman wrote a book called The Berglas Effects with the participation of Berglas himself in which his version of ACAAN is explained at length. Here’s Kaufman himself remarking on the Times story:
The writer is under the odd impression that “The Berglas Effect” has never been explained and is not explained in my book. There are 75 pages devoted to it.
So…huh. I wonder what the book says about the trick? (thx, bill)
Great Art Explained is a super YouTube series that I am somehow just now learning about that, uh, explains great art. Host James Payne has done about a dozen videos on pieces like Artemisia Gentileschi’s Judith Beheading Holofernes, Warhol’s Marilyn Diptych, and Untitled (Skull) by Jean-Michel Basquiat. His latest is about The Great Wave Off Kanagawa by Katsushika Hokusai.
In 1639 Japan closed its borders and cut itself off from the outside world. Foreigners were expelled, Western culture was forbidden, and Entering or leaving Japan was punishable by Death. It would remain that way for over 200 years.
It was under these circumstances that a quintessentially Japanese art developed. Art for the people that was consumed on an unprecedented scale.
Really interesting stuff. Subscribed.
See also several different versions of The Great Wave print and The Art of Traditional Japanese Printmaking. (via open culture)
Last week, I posted about Texas death row inmate Quintin Jones and his plea for clemency in the face of his pending execution. Again, here is his video message to Texas governor Greg Abbott:
On Wednesday evening, in the presence of two outside witnesses, Texas killed Quintin Jones. Two journalists who were to bear witness to the execution for the public were not called into the prison by officials who somehow “forgot” to do so:
Absent were two journalists who had been scheduled to attend the execution but whom prison officials said they had accidentally failed to summon.
Before he died, a video director for the NY Times recorded a short video of Jones’ last words to the public, in which he thanked everyone for helping him be a better person and even asked viewers to consider the trauma that death row prison guards endure in the course of doing their jobs. A separate statement of his last words was recorded by prison officials:
“Love all my friends and all the friendships that I have made,” Mr. Jones said, according to those state prison records. “They are like the sky. It is all part of life, like a big full plate of food for the soul. I hope I left everyone a plate of food full of happy memories, happiness and no sadness.”
Then he said, “I’m done, warden.” He was pronounced dead at 6:40 p.m.
That same day, Governor Abbott, who is a member of the so-called “pro-life” Republican party, signed a law that bans abortions in Texas after a fetal heartbeat can be detected, which is before many women are even aware they are pregnant.
As someone who is mostly unable to nap, I’ve always felt a twinge of envy towards those who can shut their eyes, drift off for 20 minutes, and awake refreshed & raring to go. Maybe I’ll have better luck after watching this TED-Ed lesson by sleep researcher Sara Mednick (author of Take a Nap! Change Your Life.), which explains when and how long you should nap for optimal results. (via open culture)
Every few months for the past couple of years, I’ve shared the movies, books, music, TV, and podcasts I’ve enjoyed (or not) recently. Here’s everything I’ve “consumed” since early February, accompanied by a mini review.
How To with John Wilson. What happens near the end of the risotto episode got all the attention, but I’m all about the bag of chips saga. (B+)
Black Art: In the Absence of Light. I can listen to artists and critics talk about art all day long. Also? Everyone in this has impeccable eyewear. (A)
Spirited Away. A masterpiece. (A)
Pfizer-BioNTech Covid-19 Vaccine (BNT162b2). Possibly the best experience of the past 5 years. (A+++++)
Casino Royale. The best of the Daniel Craig Bonds IMO. (B+)
The Lying Life of Adults by Elena Ferrante. Another marvelously constructed world with vibrant characters by Ferrante. (A)
Wandavision. A love letter to television. Watched this with the kids and we all loved it. (A)
Looper. This is perhaps my favorite type of movie: clever sci-fi with a creative director and good actors that give a shit. (A-)
Sonic the Hedgehog. Jim Carrey is the highlight here and not much else. (C+)
The Remains of the Day. One of my favorite movies. I’ve watched this every few years since 1993 and what I get out of it changes every time. Great book too. (A+)
Judas and the Black Messiah. Fantastic performances by Daniel Kaluuya and LaKeith Stanfield. (A)
Zack Snyder’s Justice League. Way too long and nearly pointless. This is what happens when you start treating the director of Legend of the Guardians: The Owls of Ga’Hoole like an auteur. (B-)
A Promised Land by Barack Obama. I recommend the audiobook version of this. You can really tell the bits of the book he cares about and the stuff he phones in a little bit more. The tone of his voice when he talks about Michelle β that love is real. (B+)
Making Sense β The Boundaries of Self. I listened to this conversation with the poet David Whyte at the beginning of March and it was exactly what I needed to hear at that time. I must have listened to his short essay on Friendship about 5 times. (A)
Thunderstruck by Erik Larson. About the invention of the wireless telegraph and the beginning of our abundantly connected world. (B+)
Still Processing - The N Word. The way that Morris and, particularly, Wortham use inclusive language is fascinating. They invite people into the conversation without any loss of insight or critical capability. A bracing rebuttal to the idea that using so-called “woke” language is hamstringing discourse in America. (A-)
Matilda by Roald Dahl. Read this aloud to the kids and was told my rendition was not nearly as good as Kate Winslet’s. (B+)
You’re Wrong About (The continuing OJ saga). This has become the show’s version of Nicholson Baker’s The Mezzanine, with entire episodes dedicated to explaining mere minutes of the trial. I am here for it. (A)
Godzilla vs. Kong. I watched this after eating an edible and I think that’s the perfect way to do it. Monsters, roar! (B)
Star Trek VI: The Undiscovered Country. One of my favorite Trek movies. (A-)
The Falcon and the Winter Soldier. Less popular with me and the kids than Wandavision. Occasionally fun but also kind of a mess, especially when it comes to the “moral of the story”. (B)
The Talk Show with Craig Mod. Every single second of this 2.5-hour-long conversation between Craig Mod and John Gruber felt like it was created specifically for me. (A-)
Rough Translation - LibertΓ©, ΓgalitΓ©, French Fries… And Couscous. A follow-up to a classic episode about a French McDonald’s that was commandeered by its employees. (B+)
Unstoppable. The perfect movie. I wouldn’t change a thing. (A)
Pac-Man 99. A nice update to this venerable game. The kids dismissed it as “too hectic”. (B+)
Fortnite. The perfect game for introverts β you can actually win by cleverly avoiding crowds and then dealing with a much more manageable 1-on-1 situation. But also I am old and there are too many buttons on this controller. (B+)
Croupier. Young Clive Owen, wow. (B+)
HazeOver. Recommended to me by Mike Davidson, this macOS app dims background windows to help you focus on your work. (B+)
Titanic. Had to rewatch after Evan Puschak’s video about it. Still an amazingly effective blockbuster movie. (A)
For All Mankind (Season One). So many people have recommended this to me over the past year and I finally got around to watching it. I was hooked within the first 5 minutes. (A)
The Mitchells vs. The Machines. Entertaining and stylistically interesting. (B+)
NYC. So much to say about this city and the resilience of the people who call it home. Still undefeated. (A)
Throughline β The Real Black Panthers. Great podcast on the political agenda and strategy of the Black Panther Party. A natural companion to Judas and The Black Messiah. (A)
Frick Madison. They have like 10% of the world’s Vermeers in just one room! (B+)
The Whitney. Great to be back here to see the work of Dawoud Bey and Julie Mehretu. (A)
The outdoor dining situation in NYC. The city has to keep this and the pandemic pedestrian areas reclaimed from cars. More room for people, less room for cars. (A)
Fairfax. This is the sister restaurant to my two favorite places in NYC, both of which closed permanently because of the pandemic, and the first restaurant I’ve been to since March 2020. We ate outside, I had too many cocktails, and it was perfect. (A+)
Past installments of my media diet are available here.
Rick Steves’ travel shows and videos typically highlight the positive aspects of travel destinations in Europe and around the world. But more recently, he’s also been making shows about Europe’s unpleasant past. In 2019, he did an hour-long TV special about the history of fascism in Europe
Because Steves hosts a travel show, they visit some of the places where this history played out, including Nuremberg, Auschwitz, and Rome, talk to historians and tour guides, and discuss fascist and anti-fascist art, including Picasso’s Guernica.
And earlier this year, Steves made a similar show that focused just on Germany, embedded above.
Traveling across Germany, we learn how fascism rose and then fell, taking millions of people with it. Visiting actual locations β from Munich to NΓΌrnberg to Berlin β we trace the roots of Nazism in the aftermath of World War I, when masses of angry people were enchanted by Hitler. We explore the totalitarian society Hitler built, and see the consequences: genocide and total war. Learning from Germany’s fascist story, we can recognize that hateful ideology as well as the tricks of wannabe dictators in our own age.
(via open culture)
While he was filming the TV adaptation of Colson Whitehead’s The Underground Railroad, director Barry Jenkins was also working on this piece, entitled The Gaze. It’s a 50-minute, non-narrative video portrait of several of the show’s actors dressed in their period clothes, wordlessly looking into the camera.
I don’t remember when we began making the piece you see here. Which is not and should not be considered an episode of The Underground Railroad. It exists apart from that, outside it. Early in production, there was a moment where I looked across the set and what I saw settled me: our background actors, in working with folks like Ms. Wendy and Mr. and Mrs. King β styled and dressed and made up by Caroline, by Lawrence and Donnie β I looked across the set and realized I was looking at my ancestors, a group of people whose images have been largely lost to the historical record. Without thinking, we paused production on the The Underground Railroad and instead harnessed our tools to capture portraits of… them.
What flows here is non-narrative. There is no story told. Throughout production, we halted our filming many times for moments like these. Moments where… standing in the spaces our ancestors stood, we had the feeling of seeing them, truly seeing them and thus, we sought to capture and share that seeing with you.
(via the morning news)
This video from Veritasium is a nice explanation of the mathematician David Hilbert’s paradox of the Grand Hotel, which illustrates that a hotel with an infinite number of rooms can still accommodate new guests even when it’s full. Until it can’t, that is. See also Steven Strogatz’s explanation of Hilbert’s infinite hotel and how Georg Cantor’s discovery of different types of infinities complicated the hotel’s hospitality. (via digg)
Edgar Wright has directed a documentary on a band called Sparks, which was formed by brothers Ron & Russell Mael in 1967 and the trailer (above) hails as “your favorite band’s favorite band”.
How can one rock band be successful, underrated, hugely influential, and criminally overlooked all at the same time? Edgar Wright’s debut documentary THE SPARKS BROTHERS, which features commentary from celebrity fans Flea, Jane Wiedlin, Beck, Jack Antonoff, Jason Schwartzman, Neil Gaiman, and more, takes audiences on a musical odyssey through five weird and wonderful decades with brothers/bandmates Ron and Russell Mael celebrating the inspiring legacy of Sparks: your favorite band’s favorite band.
The Sparks Brothers will be in theaters on June 18.
This is a treat: artist David Hockney wordlessly flipping through one of his sketchbooks from 2019 for 6 minutes. For the first few minutes, I thought that some verbal annotation would be nice, but it’s actually perfect as-is β you can just focus on looking. (via open culture)
Walking, cities, Paris, and YouTube are four of my favorite things, so this 5.5-hour, 12-mile video walking tour of Paris is right up my alley. Along the way, they visit the Notre Dame, the Arc de Triomphe, the market on Rue Mouffetard, the Jardins du Luxembourg, the Louvre, the Eiffel Tower, and lots more. If you turn the closed captions on, you can read about the histories of the places as the walk progresses. Hopefully this will tide me over until I can visit again. (via open culture)
Part of what makes this so good & funny is the obvious level of care put into making it, right down to the smallest details. The audio distortion? Perfect lip syncing? The Doppler effect?! It’s just a meme, you didn’t have to go so hard! (via the xoxo slack)
In this video, Polyphonic explores the roots of heavy metal, from the increasingly distorted guitar sounds in 50s blues to the fast-picked guitars of surf rock to the heavy rock of English groups like The Who and The Beatles to the first metal bands, Black Sabbath and Deep Purple. (via open culture)
This video focuses on one of my favorite astrophysics facts: 94% of the observable universe is permanently unreachable by humans. (Unless we discover faster-than-light travel, but that’s fantasy at this point.)
This expansion means that there is a cosmological horizon around us. Everything beyond it, is traveling faster, relative to us, than the speed of light. So everything that passes the horizon, is irretrievably out of reach forever and we will never be able to interact with it again. In a sense it’s like a black hole’s event horizon, but all around us. 94% of the galaxies we can see today have already passed it and are lost to us forever.
“Since you started watching this video, around 22 million stars have moved out of our reach forever.” And future generations, billions of years from now, won’t even be able to see any other galaxies or detect cosmic background radiation, making knowledge about the Big Bang impossible.
Quintin Jones murdered his aunt in 1999 and is scheduled to be executed on May 19, 2021. He admits his guilt, his family has forgiven him, and in this video, he shares his thoughts about personal growth & death and asks Texas governor Greg Abbott to spare his life.
During his 21 years on death row, Quin has been the epitome of a prison success story. He entered at an unimaginable low, as lost as a soul can be. And through prayer, sobriety, reconciliation with his family, and longstanding correspondence with pen pals, he has found a way to lead a meaningful life, and even to enhance the lives of others. The victim’s family β who is also Quin’s family β has forgiven him.
Emotionally, intellectually, and psychologically, human beings are ships of Theseus β we are not the same people at 30 as we were at 20 or will be at 40. The death penalty is immoral, full stop. The sooner our system of retributive justice is replaced with restorative justice, the healthier and safer our communities and society will be.
Colette is a remarkable short documentary that won the Oscar this year in the Documentary Short Subject category. You can watch the film online courtesy of The Guardian.
90-year-old Colette Marin-Catherine confronts her past by visiting the German concentration camp Mittelbau-Dora where her brother was killed. As a young girl, she fought Hitler’s Nazis as a member of the French Resistance. For 74 years, she has refused to step foot in Germany, but that changes when a young history student named Lucie enters her life. Prepared to re-open old wounds and revisit the terrors of that time, Marin-Catherine offers important lessons for us all.
Here’s an interview with the filmmakers. From our present historical distance, the horrific story and lessons of Nazism seem fairly straightforward. But as Colette shows, when you delve into the individual stories, the truth of people’s grief & experiences gets complicated. These stories are important to hear and to tell so we remember the real, human, feeling truth of how individual lives were damaged and wasted by the actions of the large and powerful.
In 2005, Thom Yorke recorded a 15-minute set for the From The Basement series β just him, a piano, and a microphone. He sang Videotape from In Rainbows and Last Flowers & Down Is the New Up from In Rainbows Disk 2. Lovely.
See also Radiohead, From The Basement.
Always a treat to watch a new time lapse storm video from Mike Olbinski. It’s in 8K as well, so if you have the bandwidth and the screen resolution, this is going to look extra good. You can see more of Olbinski’s breathtaking videos here as well as plenty more cloud content. kottke.org: home of fine cloud products. (via colossal)
The holes drilled into Arctic, Antarctic, and glacial ice to harvest ice cores can be up to 2 miles deep. One of my all-time favorite sounds is created by dropping ice down into one of these holes β it makes a super-cool pinging noise, as demonstrated in these two videos:
Ice makes similar sounds under other conditions, like if you skip rocks on a frozen lake:
Or skate on really thin ice (ok this might actually be my favorite sound, with apologies to the ice core holes):
Headphones are recommended for all of these videos. The explanation for this distinctive pinging sound, which sounds like a Star Wars blaster, has to do with how fast different sound frequencies move through the ice, as explained in this video:
(via the kid should see this)
In a career filled with iconic performances, one of the standout Prince moments came at the 2004 Rock and Roll Hall of Fame induction ceremony for George Harrison. On stage to play While My Guitar Gently Weeps were Harrison’s son Dhani, music legends Tom Petty, Jeff Lynne, and Steve Winwood, and Prince. At about 3 minutes and 30 seconds in, Prince absolutely rips the place apart with a 3-minute guitar solo for the ages. If you’ve never seen this, make sure you watch all the way to the end.
Video of the performance has been available online for years, but producer Joel Gallen recently uploaded a recut version (embedded above) that focuses more on Prince during the solo. As with all things Prince, Anil Dash shared some context for the performance, including this amazing detail about what happened to the guitar that Prince threw into the air: “long-time guitar tech Takumi Suetsugu caught the guitar & handed it to Oprah”. AS YOU DO. Dash also shared this photo by Afshin Shahidi of Prince walking, guitar in hand and seemingly unnoticed in NYC, to rehearsals for the Hall of Fame ceremony in question.

Update: This is a great oral history of the ceremony written in 2016.
Tom sort of went over to him and said, “Just cut loose and don’t feel sort of inhibited to copy anything that we have, just play your thing, just have a good time.” It was a hell of a guitar solo, and a hell of a show he actually put on for the band. When he fell back into the audience, everybody in the band freaked out, like, “Oh my God, he’s falling off the stage!” And then that whole thing with the guitar going up in the air. I didn’t even see who caught it. I just saw it go up, and I was astonished that it didn’t come back down again. Everybody wonders where that guitar went, and I gotta tell you, I was on the stage, and I wonder where it went, too.
From the US National Archives, an 8-minute film of aerial footage filmed from a dirigible piloted by Roy Knabenshue in 1914. I am not super familiar with Chicago and the architecture of the time, but given the city’s role in the development & popularization of the skyscraper, I bet there are some amazing views in here of iconic buildings not so long after they were constructed as well as some buildings and spaces that no longer exist.
If you wish, you can also watch the upsampled, colorized, and “AI enhanced” version of this video. As I’ve said before, I’m not a huge fan of these, uh, restorations. We shouldn’t accept crappy colorization of historic B&W films just because an AI did it. (via @davidplotz)
The NES version of Tetris has been out in the world for more than 30 years now. Somehow, using the same controllers and human hands that have been in use all this time, a new technique has been invented that’s resulting in scores and maneuvers that no one using The Old Ways could have dreamed of. One YouTube commenter sums it up:
The fact that we are still out here revolutionizing the mere concept of pressing a button on a controller that is almost 40 years old. I love this community.
This is a great illustration of innovation in action. There’s a clearly new invention, based on prior effort (standing on the shoulders of giants), that allows for greater capabilities and, though it’s still too early to tell in this case, seems likely to shift power to people who utilize it. And it all takes place inside a small and contained world where we can easily observe the effects.
See also Jacob Sweet’s piece from the New Yorker a couple of months ago, The Revolution in Classic Tetris, which contains this unbelievable tidbit:
Dana Wilcox, one of the highest-scoring players on the Twin Galaxies leaderboard, discovered that she’d played for twenty years without knowing that the blocks could be spun in either direction.
(via robin sloan)
Watch as David Howell sets up several historical chess positions and quizzes world champion Magnus Carlsen on them. Spoiler alert: he knows them all. The one he gets in just four moves after opening is just…otherworldly.
Carlsen is one of a number of world class performers that have prodigious memory skills. See also LeBron James Has a Photographic Memory, Xavi HernΓ‘ndez identifying goals he scored (and the final scores of those matches), Aaron Rodgers’ memory of his significant plays, and Iker Casillas remembers the score of every match he’s played. (via robin sloan)
Update: Former world champion Garry Kasparov:
I was tested similarly in my world championship days, and yes, most Grandmasters can identify thousands of games and positions. It’s not trivial, but, as Magnus said, it’s our job! But his serious interest in the past (human!) games is also a competitive advantage.
Kasparov once gave an impressive public exhibition of this skill. (via @stevenstrogatz)
You’re probably aware that black holes are weird. You can learn more about just how extremely odd they are by watching this animated primer on black holes by Kurzgesagt. The explanation about how long black holes live starting at ~9:30 is legitimately mindblowing β that hourglass metaphor especially.
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