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When will the last human be born and how many people will there ever be?

The distant future could be even further than we think.

in a nutshell youtube, last human youtube
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If the world isn't ending, how does that impact the choices we make?

Is the world ending? For real this time?

It might certainly seem that way, considering constant political upheaval, relentless environmental distress and a general perceived failing of the human race. As it turns out, this is not a new way of thinking. It may very well be as old as civilization itself.

And perhaps more importantly, it might be the exact piece of false logic keeping us from making crucial decisions that can shape our future … the very, very, very far distant future.

Kurzgesagt – In a Nutshell, a YouTube channel that uses animation to “explain things with optimistic nihilism,” explores this existential quandary in a video titled “The Last Human – A Glimpse Into the Far Future.”

The video begins with a not-so-simple question: When will the last human be born and how many people will there ever be?

You can watch the full video below:

Making an assumption that the current birth rate would stay the same (unlikely, but for the sake of discussion), that would mean the global population would increase by 125 million people each year. Combine that with the fact that the average collective life span of most mammal species before extinction is somewhere around 1-10 million years, and we can conservatively estimate that there is still a whopping 800,000 more years before a real apocalypse is upon us.

Yes, even under a cynical lens, we might be looking at a future of 1.2 quadrillion people yet to be born.

Of course, galactic catastrophes can happen. A supernova, gamma ray bursts … the things sci-fi movies like to scare us with. But even those must fall under very specific parameters in order to pose a real threat. And if they did happen, humanity is still “relatively safe from extinction, maybe even for billions of years.”

Things get even more complex if we consider we might eventually leave Earth.

“If future people can colonize, say, 100 billion stars and live there for 10 billion years, while each generating 100 million births per year, then we can expect something like a hundred octillion lives to be lived in the future. This is a 1 with 29 zeros, a hundred thousand trillion, trillion,” the video states.

The potential for added zeros grows and grows from there. In this futuristic scenario, we could see a blending of colonized galaxies. Yes, galaxies. Plural. Which, the video concludes, could give us a potential for a tredecillion lives. Never heard of a tredecillion? It means a million, trillion, trillion, trillion potential people.


“Every generation assumes they’re important enough to witness the apocalypse and then life just goes on,” which the video explains is a phenomenon called societal pessimism. However, because the potential size of the future could in fact be vastly greater than our present comprehension, it might behoove us all to think of civilization as being at the beginning of its story, rather than the end.

longtermism, in a nutshell youtube

The future is still in our hands

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With this in mind, there might be an even more powerful moral imperative attached to our actions today, something explored in a school of thought referred to as longtermism. Longtermism doesn’t argue that human life most certainly will go on, but focuses on the possibility that it could. And because of that, we might want to examine what the long-term consequences of our choices could be for those future generations, ethically speaking.

After all, if there’s even a chance that billions of people could still be born despite our seemingly bleak current circumstances, then maybe we owe it to ourselves as a species to not throw the tredecillion babies out with the bathwater.

It’s a fascinating thought experiment, not to mention a pretty cool argument in the name of rational optimism. Plus, it’s made all the more palatable with fun graphics. Thank you, In a Nutshell!

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A sea lion hopped on a woman's boat to escape a group of killer whales and the footage is wild

What would you do if you were in the boat?

Screenshots via @castrowas95/Twitter

A seal escaping a killer whale attack.

In the Pacific Northwest, orca sightings are a fairly common occurrence. Still, tourists and locals alike marvel when a pod of "sea pandas" swims by, whipping out their phones to capture some of nature's most beautiful and intelligent creatures in their natural habitat. While orcas aren't a threat to humans, there's a reason they're called "killer whales." To their prey, which includes just about everything that swims except humans, they are terrifying apex predators who hunt in packs and will even coordinate to attack whales several times their own size.

So if you're a human alone on a little platform boat, and a sea lion that a group of orcas was eyeing for lunch jumps onto your boat, you might feel a little wary. Especially when those orcas don't just swim on by, but surround you head-on.

Watch exactly that scenario play out (language warning, if you've got wee ones you don't want f-bombed):


 

Ummm, yeah. An orca sighting is one thing, but this is a whole other story. Orcas have been known to knock large prey off of icebergs, so the whole "orcas don't hurt humans" thing doesn't feel super reassuring in this scenario.

The footage came from TikTok user @nutabull, whose now-deleted account stated she was from Vancouver Island.

The viral video sparked a debate about whether the sea lion should be kicked off the boat or not. The woman kept telling the sea lion it "had to go" with a frank "Sorry, buddy, that's life," message, though she never actively tried to push it off. Many commenters joked about yeeting the sea lion off the boat to avoid a potentially disastrous encounter with the orcas. Others were on #teamsealion, saying they wouldn't have the heart to boot the poor thing.

It's a big philosophical question. The philosophical underpinnings of the belief that humans should stay out of the matters of wild animals, so as not to interrupt the delicate balance of nature, is called "relational non-interventionism." The philosophy holds that we have no general obligation to alleviate animal suffering, and that we typically do not have special obligations to ease the suffering of wild animals. Therefore, we generally do not have a duty to intervene in nature to ease the suffering of wild animals. That's one thing to believe, but who wants to see animals suffer?


The reality is orcas eat sea lions—the circle of life and whatnot. Most of us just don't find ourselves in the middle of that circle, having to figure out whether the apex predators surrounding our boat are going to patiently wait for their lunch to come back or take it upon themselves to bump it back into the water.

Thankfully for the woman, the sea lion seemed to decide on its own that its options were limited and dove back in to take its chances with the orcas. But phew, that encounter would be harrowing for just about anyone.

Best of luck, sea lion. Hope you're an exceptional swimmer.

This article originally appeared four years ago.

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Guy uses a Ziploc bag to show why text is reversed in mirrors and people finally get it

A seemingly simple but surprisingly confusing reality.

Photo credit: Canva

Why is text reversed in mirrors?

Have you ever wondered why text shows up backwards in a mirror? It's confusing to our brains because it doesn't seem like anything else is flipped like that. If we turn our head, it doesn't move the opposite direction in a mirror. Or does it? After all, right-handed you is actually left-handed you in the mirror. Right? (Wait, is that right?)

Mirrors can be confusing, despite not being very complicated. A mirror image is simply a reflection of what's before it. But when someone else is looking at us head on, they don't see text in reverse, so why don't we see what other people see when we see ourselves in a mirror?

  Kitten Aww GIF by MOODMAN  Giphy  

(If you think this is a super stupid question with a super obvious answer, congratulations. Pat yourself on the back and scootch along so the folks who don't fully grasp the physics of mirrors can enjoy a demonstration that makes it a little easier to understand.)

"Why do mirrors reverse text?" asks the creator behind @humanteneleven on YouTube. "You might think it's just a property of mirrors—they flip things from left to right—but that's not true." He then picks up a metal arrow to show that it points the same direction in the mirror as it does in real life. So why is the text flipped when the arrow isn't?

  - YouTube  www.youtube.com  

He then holds up a book to show how the text on the book cover appears backwards, just like the shirt. But when he holds up a Ziploc bag with the word "HELLO" written on it, the word shows up properly.

That's because he had to flip the book over to see the cover text in the mirror. The baggy he could just hold up and see the letters through the transparent plastic, just as we see them in real life. If he flips the baggy over like he did the book, the text shows up backwards in the mirror, just like it does in real life.

"So it's actually not the mirror that's flipping anything from left to right," he says. "It's the human."

People appreciated the simple, straightforward explanation and demonstrations.

"One of the most insightful demonstrations I've seen. It's simple and explains the phenomenon. Well done!"

 

"While I've heard this explanation many times before, I've only recently seen it demonstrated with text-on-transparency, which is what really makes it click. Great video!"

"Love these sorts of demonstrations. It’s a bit of a complicated one, but I love seeing how different people's minds work when explaining simple things like this. My kid explains it with “left is on the left, right is on the right, things aren’t flipped, they are mirrored” but it’s true that you are the one who flips things and I’ve never thought of it that way before."

"Oh my God, I haven't understood explanations from physics videos about why mirrors flip but this, gosh this helps."

Mirrors have been hilariously befuddling people in other videos as they try to figure out how the mirror knows what's behind a barrier placed in front of objects.

@sarahcoome

this is kinda creepy 👀 #mirror #relatable #creepy

 

Is this something all of us should probably have learned in high school? Yes. Do all of us remember everything we learned in high school? No. Does the scientific explanation make perfect sense to everyone even if it's explained in detail? Um, no.

Like the reversed text question, having a simplified explanation that doesn't fully get into the nitty gritty physics and geometry of how mirrors work is helpful for some folks.

 

  - YouTube  www.youtube.com  

 

For those who do want a bit more scientific substance to their explanations, this next video does a good job of giving a bit more detail while still keeping the explanation simple. It even uses a visual diagram to explain:

  - YouTube  www.youtube.com  

 

And for those who say, "This is so basic! How do people not understand this?" here's a video that really does get into the nitty gritty physics and geometry of how mirrors work, diving into ray and wave optics, photons, wave functions, probability, and quantum mechanics. It's only 12 minutes, and it manages to entertain while explaining, but it certainly blows the notion that understanding mirrors is super simple.

  - YouTube  www.youtube.com  

 

As one commenter wrote, "I thought I understood mirrors. I understand mirrors even less now. And that's a compliment."

Isn't science fun?

This article originally appeared in May.

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Math professor shares thermo-dynamic hack to cool your sweltering car in seconds

You don't even have to use your A/C.

via Canva/Photos

A woman in a hot car.

Cars can become unbearably hot in the summer. Even at a seemingly mild 80 degrees outside, the temperature inside can soar to a scorching 109°F within 20 minutes. According to the CDC, in just 40 minutes it can escalate to a blistering 118°F. After an hour, it can peak at a searing 123°F. And that’s just the air temperature; a dark dashboard or seat can reach a staggering 200°F.

"These objects (e.g., dashboard, steering wheel, child seat) heat the adjacent air by conduction and convection and also give off longwave radiation (red) which is very efficient at warming the air trapped inside a vehicle," the CDC explained in their report. It can take five to 10 minutes for your car to cool down on a hot day by turning on the air conditioning, which probably means you burn your buttocks and thighs on the hot seat. That’s why Hannah Fry shared an amazing hack on TikTok, demonstrating how to cool your car down in seconds using the laws of thermodynamics.

Fry is Professor of the Public Understanding of Mathematics at the University of Cambridge. She is a mathematician, a best-selling author, an award-winning science host, and the host of numerous popular podcasts and television shows.

@fryrsquared

That age-old dilemma of choosing between having a non-sweltering car or baffling a passerby because you look like a fool who doesn't know how to use a door

Fry suggests that instead of turning on the air conditioning, which she claims is “not worth it” because of the time it takes, open one of the windows on the opposite side of the door. Then, rapidly open and close the driver’s side door, so it moves back and forth like a fan.

“The reason why it works is that when you open and close the door, especially if you do it quickly, the door, as it's moving outwards, it sweeps out all of the air that's in its way, creating this sort of area of low pressure that you get here,” Fry said. “And then that sets up something called bulk flow, which is where all of the hot, sweaty, horrible air inside the car is drawn outwards.”

 hot car, hot steering wheel, hot man, sweat, summer,  A man sweating in his car.via Canva/Photos

Fry’s super practical approach to a problem everyone deals with blew many people’s minds in the comments. “If I ever catch someone in real life doing this, I’m gonna know they’ve watched this exact video,” a commenter wrote. “I will give it a go, but while opening and closing the door, scream, ‘Be gone, heat demons! BE GONE!’” another added. “Going to remember this the next time my partner farts in the car,” someone joked.

The fact that the inside air temperature in a car and the outside temperature are often drastically different, especially in the summer, serves as a crucial reminder to dog owners everywhere to never leave their pet unattended in a parked car. "Most dog owners know that you can’t leave a pet in a hot car," the American Kennel Club writes. "Temperatures can rise to dangerous levels in just minutes, putting your dog at risk of heatstroke. But what if you open a window a little bit? Does that make it safe to leave your dog in the car? The answer is simple. You should never leave a dog alone in the car, even with the windows cracked. In some states, it’s even illegal."

The following video by The Dodo explains why leaving a dog in a hot car can be deadly, even when it doesn’t feel that hot outside.

  - YouTube  www.youtube.com  

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The remote island where residents speak a fascinating blend of Southern and Old English

Experts say Ocracoke's endlessly-entertaining dialect is rapidly disappearing.

BBC Global/YouTube & EZScore/Flickr

An isolated island called Ocracoke is home to a unique accent not found anywhere else in the world

American English comes in all sorts of different flavors and varieties. I grew up in Baltimore, which shares some dialectical DNA with the accent you find in other Northeastern cities like Philadelphia. Baldamor, hon! There's the New England dialects, most famously the Boston accent: Pahk the cah at Havahd yahd! The New York accent is world famous, as is the deep Southern twang, which gives way to a thick Cajun accent the closer you get to the water in Florida and Louisiana.

These are all different versions of the greater American dialect. But there is one place, a tiny island off the coast of North Carolina, where a few residents speak in such a unique way that it's not even identified as American by most people around the world.

Ocracoke, North Carolina is home to a unique dialect called the Brogue: A strange blend of American Southern, Old Elizabethan English, with little bits of Irish and even Australian thrown in.


 ocracoke, north carolina, the brogue, hoi toider, accents, dialect, language, linguistics, anthropology Americans think Hoi Toider sounds English. People from England think it sounds like something else.  Giphy  

The Brogue, also known as Hoi Toider, is absolutely fascinating to hear in action. When you watch interviews with the locals of the island, they at first appear to be speaking a form of deep American southern — you can hear the twang the way you might in parts of Georgia of Alabama. But then, without warning, a word or phrase will slip out that sounds distinctly British. Old English even. Then you'll swear you hear a bit of Irish!

The dialect owes its roots to a surprising source: Pirates.

Pirates loved to hide out on Ocracoke as the island is incredibly remote, about 20 miles from the mainland of North Carolina. Even today there are no bridges or flights to Ocracoke; it can only be reached by a (quite lengthy) boat ride. Eventually, the island was actually purchased by the Blackbeard's quartermaster (yes, that Blackbeard), William Howard, where he created something of a pirate settlement. English sailors and Native American tribes also passed through and had their own unique impact on the culture and developing language of the island.


 ocracoke, north carolina, blackbeard, pirates, the brogue, hoi toider, accents, dialect, language, linguistics, anthropology Legend has it Blackbeard himself named the island.  Giphy  

In case have your doubts about the island's buccaneerish roots: "In one popular island legend, Ocracoke comes from the phrase, 'Oh, crow cock,' which was spoken by the infamous pirate Blackbeard as he waited to do battle at sunrise with the governor’s forces that had come to capture him," writes a guide from NC State University.

The dialect had a lot of room to develop without much outside influence. The BBC writes, "Howard's community lived in near-isolation for almost two centuries. Electricity didn't arrive at the island until 1938 and a ferry service didn't start until 1957, leaving the islanders cut off except for the occasional supply trip to the mainland."

That's why Hoi Toider is still alive to this day, although its speaking population has dwindled. Here are a few hallmark phrases of the unique dialect:

A 'dingbatter' is anyone not from the island; a tourist. An 'O'Cocker' is anyone born on the island of Ocracoke. A 'buck' is a good male friend, while a 'puck' is a female friend. The Brogue uses 'weren't' liberally for singular nouns ("The sun weren't out yesterday.") and frequently adds an 'a' in front of verbs ("We went a-fishin' this morning").

But to fully appreciate Hoi Toider, you've got to hear it in action:


  - YouTube  www.youtube.com  

Experts say, as awesome as the Brogue is, it will likely disappear within the next 50 years.

Though the island remains about as remote as it comes, in 2025 there's no escaping the influence of social media, television, and film. Every generation born on the island is a smidge less-adoptive of the Brogue than the one that came before.

It will probably be mostly gone in the next couple of generations, which feels like a tragedy. Instead of "dingbatter" and "buck," the kids will be saying "Skibidi toilet" and "rizz." OK, maybe that's an exaggeration, but young people growing up on the island won't be as immersed in the language as their elders and will begin to speak more and more like your average American.

  - YouTube  www.youtube.com  

There's a concept called culture homogenization. It's the idea that over time, because of technology and globalization, unique individual cultures from around the world will all start to look more and more the same. It's why you see fast food restaurants directly next to the Leaning Tower of Pisa and people all over the globe listening to the same handful of musical artists.

Ocracoke has managed to hang on longer than most places due to how difficult it is to reach. Here's hoping that the Ocracoke Brogue can survive somehow, some way, in little pockets of the island. It's just too dang cool and interesting to go away just yet.

This article originally appeared in May.

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A woman accidentally said, 'Love you!' to an important client. His response was perfect.

He even followed up with a heartwarming e-mail.

Photo credit: Canva

Saying "I love you!" by accident is one of life's most cringe moments.

For many of us, telling our friends and family that we love them is second nature. Every time someone leaves the house, "Love you!" Before bed at night, "Love you!" Getting off a call with them, "Love you!"

That's all well and good until that sweetly ingrained habit spills over into your work life. Especially when you're talking to an important client, where the boundaries of professional conduct are particularly important to uphold. (Do you feel the cringe coming?)

  I Love You Elf GIF by MOODMAN  Giphy  

A woman shared an oh-so-human story about absent-mindedly telling a client she loved him, and his thoughtful response has people cheering.

"Accidentally said 'Love you!' at the end of a call with an important client yesterday," wrote a Reddit user. "I heard him giggle as I hung up, and I was mortified. Today, I saw he emailed me this:"

The email began, "Hey—Just wanted to say that I didn't mean to laugh at you when you accidentally signed off on our call with a 'love you.' I just found it funny because I've definitely done that before, and I know it happens."

Okay, phew, he understood that the laughing was mortifying and he wasn't bothered by the "love you." But then he added the absolute best thing he could have said about the situation:

"I'm glad you have enough love in your life that that response comes naturally. If anything, you should be proud of that. :)"

Then he mercifully resumed their professional conversation. "Have a great weekend! We'll follow up about my call with Chris on Wednesday, as discussed."

 embarrassing story, saying I love you on accident, workplace stories, professional communication "Love you!" Oops.Photo credit: Canva

He didn't just ignore the elephant in the room and let it hang over her like an awkward cloud. He put her at ease, letting her know he's done it before and it happens and is no big deal. But then he took it a step further, adding a deeper human layer to the moment by acknowledging the fact that the words flowing so automatically and easily for her meant she was surrounded by love.

The client's emotional intelligence and thoughtful response warmed people's hearts.

"What a great and respectful response. He is completely right, it’s such a beautiful thing to have that much love in your life that it comes out naturally."

"You work with good people."

"Honestly, this made my day 😂 It's so wholesome how they responded. Shows that a little kindness (even accidental) always leaves a good impression!"

"Such a classy response. Made you feel at ease while staying professional and moving the conversation forward."

"Green flags from that client."

  Green Flag GIF by The Last Talk Show  Giphy  

People also shared their own similar experiences with blurting out accidental "love you"s and it was a veritable love-fest:

"I told my supervisor I loved her at the end of our weekly touch point call - she chuckled and said she loved me too. We shared a good laugh. I am happy to see empathy from a random human, it is much needed."

"I said 'love you' to my new boss at labcorp when she called me to tell me I passed my drug test. Same thing, hanging up, not thinking, she gave me my results and my start date to come in for orientation and I ended the call with 'bye love you!'"

"Back in the day I straight up called one of my bosses mom. It was so embarrassing I almost died."

"A surprising number of people have done this at least once. Happens when you’re distracted and tired. My ex husband (a prosecutor) accidentally ended a phone call with 'I love you' when talking to a rural county sheriff in the middle of the night."

  Embarrassed Hide GIF by flor  Giphy  

"I had a coworker say 'love you,' just as we were about to hang up. There was an awkward pause, clearly neither of us had hung up, then he added, 'Don’t tell my wife.' We both laughed and finally disconnected."

"I did that with my ex husband last Thursday, we both burst out laughing lol. Happily we get along great and he and his fiancée are attending my wedding next week."

"Was on phone with my boss right after he had called his wife. He ended the call with "love you." Had so much fun telling him that while I cared for him, I didn't think it was love."

Embarrassing moments don't have to ruin your day—in fact, when handled like this client, they can turn into beautiful moments of human connection. This kind of relatability, empathy, and emotional intelligence makes us all feel better about our shared humanity, oopsies and all.

This article originally appeared in May.

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