6/1/2026 at 6:07:57 PM
> If you encountered a cheetah in pre-industrial times (and survived the meeting), you might think it was impossible for anything to go faster.Fun fact, there is no historical evidence of an adult human ever dying from a cheetah attack. They are naturally shy, and a lot smaller than you may realize.
by jelder
6/1/2026 at 6:40:46 PM
There's a story about some Kenyans outrunning a Cheetah in 6km. It had been killing their livestock, so they decided to go after it.Cheetahs are very fast, but humans have way more endurance.
by forinti
6/1/2026 at 6:55:09 PM
> Cheetahs are very fast, but humans have way more endurance.https://en.wikipedia.org/wiki/Man_versus_Horse_Marathon
> The Man versus Horse Marathon is an annual race over 21 miles (34 km), where runners compete against riders on horseback through a mix of road, trail and mountainous terrain. The race, which is a shorter distance than an official marathon road race, takes place in the Welsh town of Llanwrtyd Wells every June.
> ...
> The event started in 1980, when local landlord Gordon Green overheard a discussion between two men in his pub, the Neuadd Arms. One man suggested that over a significant distance across country, man was equal to any horse. Green decided that the challenge should be tested in full public view, and organised the first event.
While the horses had a string of wins from 2008 to 2019, 2022 to 2025 had three wins for humans and one win for a horse.
The next race event: https://www.green-events.co.uk/man-v-horse
by shagie
6/1/2026 at 7:31:45 PM
The Man vs Horse marathon is interesting but in a real race we have no actual chance of winning.There are horse endurance races where the winner arrived in 7,5 hours after 160km[1]. That's a sub 2-hours marathon almost 4 times in a row (not to mention with a guy on your back).
[1] https://eatnstays.com/uaes-almazrouei-wins-almutadil-cup-at-...
by blaze33
6/1/2026 at 7:40:02 PM
“in a real race we have no actual chance of winning” is an absolutely wild thing to say in response to a link to a real race in which the human has won the last few years in a row.by stephencanon
6/1/2026 at 9:46:25 PM
I think it implies that the best competitors are not participating.by projektfu
6/1/2026 at 7:29:33 PM
Wow, seems surprisingly balanced. I would guess that if it was 50% longer distance than humans would win reliably, and 50% shorter would allow the horses to win?by aqfamnzc
6/2/2026 at 12:53:16 AM
The weather conditions also impact it significantly.https://www.outsideonline.com/health/training-performance/hu...
> Lobb’s victory came on a hot day, as did Florian Holzinger’s subsequent victory in 2007—a significant detail, according to a new study in the journal Experimental Physiology from Lewis Halsey of the University of Roehampton in Britain and Caleb Bryce of the Botswana Predator Conservation Trust. Halsey and Bryce gathered historical data from three endurance races that pit humans against horses, including the Man Versus Horse Marathon, to test the idea that humans are uniquely adapted to run for long distances in hot weather.
> This idea has been around since the 1980s, and it gained prominence when Harvard anthropologist Daniel Lieberman and University of Utah biologist Dennis Bramble published a 2004 Nature paper hypothesizing that running had “substantially shaped human evolution.” They argued that our ability to keep running at a moderate pace even on hot days allowed us to run prey like kudu to exhaustion or outcompete other animals in the race to scavenge carcasses left by other large predators.
There's a plot with the analysis of the Old Dominion with weather stations in there that show a steeper negative slope for horses compared to the humans.
> Overall, for every increase of 1 degree Celsius (1.8 degrees Fahrenheit), the horses slowed down by about 1 percent—or 0.07 miles per hour, to be precise. The humans, on the other hand, slowed down by just 0.04 miles per hour for each extra degree of heat. That 36 percent advantage for the humans was statistically significant.
---
For the Man vs Horse, the weather conditions ("Hot", "Rain/sun/windy" - not exact values)... the entry for 2022 was the human winning by 1:51 on a warm day, and 2023 was a human wining by 9:44 on a sweltering day.
by shagie
6/1/2026 at 7:57:23 PM
Think it's more to do with hilly, wooded courses unfavourable to horses and a requirement that the horse's heart rate remain below a certain threshold when inspected by a vet in the middle and end of a course, whereas the leading humans are maxing out their effortsI don't think the Mongol cavalry would lose races to humans over any distance of steppe
by notahacker
6/1/2026 at 9:34:59 PM
Yeah I think on say, a proper road the horse would win at any distance.by neaden
6/1/2026 at 11:22:10 PM
the road adds some infrastructure - i think at that point the person should get a bike?by 8note
6/2/2026 at 12:54:32 AM
1990: For a few joyous years there was the Man v Horse v Bike competition in Mid-Wales - https://youtu.be/vFlglZUIKO8by shagie
6/1/2026 at 10:49:00 PM
There's probably some upper limit to it, i am not sure a horse could live through the ultra marathon moab race in the western us.by twosdai
6/1/2026 at 10:31:48 PM
There was a great radiolab episode about it a few years ago but I remember it being in Utah not UKby FergusArgyll
6/2/2026 at 1:09:10 AM
https://radiolab.org/podcast/man-against-horsehttps://en.wikipedia.org/wiki/Man_versus_Horse_Marathon
> ... There are other Man versus Horse races — in Scotland based at Dores, near Loch Ness, in Central North Island, New Zealand and in the U.S. city of Prescott, Arizona.
And the Arizona race page: https://managainsthorse.com
by shagie
6/1/2026 at 6:54:22 PM
I think the term is persistence hunting (https://en.wikipedia.org/wiki/Persistence_hunting). There was an intriguing blog post years ago (which sadly I can’t find) about how terrifying a fictional portrayal of persistence hunting would be- grinding down prey through exhaustion, thinking you’ve escaped but being slowly tracked down.by topkai22
6/1/2026 at 7:16:00 PM
There's also the story "Go, Go, Go, Said the Bird" by Sonya Dorman in the first Dangerous Visions which is like this, in a way.by foobiekr
6/1/2026 at 7:59:06 PM
There’s also “the ruum” by Arthur Porges[0]. We got as part of English class in high school, a long time ago.Try not to read the Wikipedia as it might spoil the short story, there’s the pdf available on the web somewhere
by stoneman24
6/1/2026 at 8:38:11 PM
Yes! I remember reading that, as you say, a long time ago. This is the first time I’ve seen someone else reference it. I love that story.by sonofhans
6/1/2026 at 11:29:20 PM
I read it too in school. I thought it was super obscure!by Timwi
6/1/2026 at 11:40:13 PM
That is how wolves hunt. Their system includes switching leads to maintain pressure on the prey while maintaining the packs endurance.by throwawayffffas
6/1/2026 at 9:14:17 PM
https://en.wikipedia.org/wiki/It_Followsby tptacek
6/1/2026 at 11:46:34 PM
The fact that no one in that movie considered placing a treadmill at a strategic point vexed me to no end.by throwawayffffas
6/1/2026 at 7:17:52 PM
Somehow that reminds of the old B-movie Surviving the Game with Ice-T.by _doctor_love
6/1/2026 at 7:29:19 PM
Wooly Mammoth basically living out the plot of It Follows.by glenstein
6/1/2026 at 9:29:33 PM
Ice yachts get well over 100 mph. I'm not sure how much they were used in pre-industrial times.by suzzer99
6/1/2026 at 6:40:00 PM
Yep. That said, unlike cheetahs, there’s plenty of evidence of leopards attacking humans. And these days, it’s the leopards, the closed-AI types and misanthropes -- telling everyone, “AI will take your job and there’s nothing you can do about it.”by cute_boi
6/1/2026 at 7:33:25 PM
I keep seeing this and I want to speak to it.When Dario and others say things like "this is happening and we should probably figure out what to do about it" what ends up happening is people hear "this is happening," see that the person warning them is the person doing the thing, and then short-circuit. "Why can't you just stop then?"
Dario's point, and the point of the people actually trying to solve the problem, is that AI is not just Anthropic and OpenAI. It's the knowledge that you can put more compute in, and get more capability out.
It is a technology now. It exists, in the world. Wishing will not make it go away. Being angry at it will not make it go away. Lying about how much water it uses will not make it go away. If Anthropic and OpenAI Shut down tomorrow, Accenture will not say "oh guess that llm thing won't work, let's go back to hiring humans!"
It is a truth that you can multiply matrices and get something that is economically useful. We cannot un-know this.
Physics allows it, so it will happen. So we should probably figure out what the heck to do about it. If your answer is something along the lines of "restrict it" then 1. let me know how that goes when other people don't, and 2. I really would rather prefer a world where we have the machines do the work the machines can do, not a world where we have human makework. If this means we need to figure out redistribution, let's talk about redistribution!
by ctoth
6/1/2026 at 7:54:45 PM
Physics allows this, and actually taking advantage of it requires billions of dollars of unprecedented infrastructure buildout that is already destabilizing the power grid.The only reason that infrastructure buildout is happening at all is the ideological capture of a small handful of obscenely wealthy people, who are fueling this buildout by spreading the extreme paranoia you’re echoing here.
I do not understand why no one else can see the circularity of this reasoning. There is nothing inevitable about tying up all of this productive capital in the pursuit of AI. There are many, many other projects requiring similar capital and human effort, with much more obvious payoffs, such as decarbonizing the world’s energy systems.
“It’s physically possible to provide abundant electricity without burning fossil fuels” is more provably true than any of the insane science fiction bullshit that undergirds the AI buildout, and yet, the entire clean energy industry is still having to build insane financial Rube Goldberg contraptions to make incremental progress.
“Inevitability” is a lie, period. This entire thing is extremely historically contingent, and we could easily stop this train tomorrow.
by mbgerring
6/1/2026 at 10:14:37 PM
> This entire thing is extremely historically contingent, and we could easily stop this train tomorrow.So, the Baruch Plan?
The Manhattan Project was $~2B in 1945 dollars, and a national-scale industrial mobilization. Now North Korea has the bomb. That's with nuclear material, which doesn't get easier and easier and easier to work with every year.
Compare to the price to train GPT-2 in 2019 ($43,000), and in 2026 ($73) [0].
by ctoth
6/2/2026 at 12:11:05 AM
Since nobody uses GPT-2 any more it's more informative to compare the price to train GPT-2 in 2019 and the price to train GPT 5.5 in 2026. Unfortunately that cost is not disclosed but it's probably in the billions.The point being: the price to train frontier models isn't coming down, nor is it going to come down because for models to remain on the frontier they have to keep getting bigger and bigger (and trained on more and more data).
by YeGoblynQueenne
6/1/2026 at 11:08:30 PM
I don't think we can stop it, but the people saying "this is happening and we should probably figure out what to do about it" are doing their best to accelerate it, which gives us less time to figure out what to do about it.by aidenn0
6/1/2026 at 11:14:56 PM
The people saying this is happening are competing with each other for resources, so there's no way for one of them to hold back without losing out to the others. We see this with people dropping Claude subscriptions in favor of ChatGPT because codex 5.5 > Claude Opus 4.6/7/8. Anthropic is losing money by not releasing Mythos.by fragmede
6/1/2026 at 7:46:08 PM
A US-China AGI ban treaty could prevent superintelligence indefinitely. Data centers are hard to hide. Have fun buying GPUs when you're cut off from all global payments. America would have to make some unpleasant concessions but that seems like a solid trade for preventing a wide variety of nightmare futures.by somesortofthing
6/1/2026 at 10:56:56 PM
Is very difficult (not to say impossible) to ban a ill-defined thing.by leonidasv
6/1/2026 at 10:52:03 PM
> When Dario and others say things like "this is happening and we should probably figure out what to do about it" what ends up happening is people hear "this is happening," see that the person warning them is the person doing the thing, and then short-circuit. "Why can't you just stop then?"I still believe Dario asks these questions in good faith. Nobody believes that about e.g. Sam Altman or Elon Musk. They compared themselves to Oppenheimer because it helped them get attention. When it started an actual regulatory conversation, they were suddenly less worried.
by JumpCrisscross