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More Layers Unlock 2^N Transformer Context Depth with Divide and Conquer

https://ml-mike.com/blog/divide_and_conquer
1•michael_lutz•36s ago•1 comments

ATC/OSDI 2025 Impressions

http://muratbuffalo.blogspot.com/2025/07/atcosdi-2025-impressions.html
1•qianli_cs•39s ago•0 comments

Sweden: The 101.2% Solution (1976)

https://time.com/archive/6847727/sweden-the-101-2-solution/
2•pr337h4m•11m ago•0 comments

Cops' favorite AI tool automatically deletes evidence of when AI was used

https://arstechnica.com/tech-policy/2025/07/cops-favorite-ai-tool-automatically-deletes-evidence-of-when-ai-was-used/
3•cainxinth•12m ago•0 comments

S an AI dev and content creator, I got tired of platforms butchering my Markdown

https://stripmd.thistools.app
1•hhhhmkk•13m ago•2 comments

How to Build a Free Personal Cloud Using Open-Source Tools

https://medium.com/@harendra21/how-to-build-a-free-personal-cloud-using-open-source-tools-20a449c44481
1•harendra21•15m ago•0 comments

Real Stagnation: 6 Years of GeForce RTX 60 Class GPUs [video]

https://www.youtube.com/watch?v=lIftP0Ut2lU
1•msk-lywenn•16m ago•0 comments

Sex Lives of the Puritans, Part 1: The Courting Tube

http://newenglandfolklore.blogspot.com/2011/05/sex-lives-of-puritans-part-1-courting.html
3•Bluestein•17m ago•0 comments

"high level" languages are easier to optimize

https://jyn.dev/high-level-languages-are-easier-to-optimize/
1•zdw•19m ago•0 comments

Tenant-based routing and consistent hashing

https://kirshatrov.com/posts/chash
1•ingve•20m ago•0 comments

Show HN: DesignArena – crowdsourced benchmark for AI-generated UI/UX

https://www.designarena.ai/
4•grace77•23m ago•0 comments

Earth Is Spinning Faster and Days Are Getting Shorter, for Now

https://www.nytimes.com/2025/07/11/science/earth-speeding-up-summer-days-shorter.html
2•Brajeshwar•27m ago•0 comments

Memories Without Brains

https://aeon.co/essays/what-can-slime-mould-teach-us-about-biological-memory
2•Brajeshwar•27m ago•0 comments

Contours of European Strategic Autonomy

https://minnalander.substack.com/p/contours-of-european-strategic-autonomy
3•exceptione•27m ago•0 comments

The Last Post (2011)

https://www.penmachine.com/2011/05/the-last-post
1•Brajeshwar•27m ago•0 comments

Psychedelics as Tools: Reflections After 20 Compounds and Decade of Experiments

https://gavinray97.github.io/blog/perspectives-on-psychedelic-use
1•gavinray•34m ago•0 comments

Exact Predicates, Exact Constructions and Combinatorics for Mesh CSG

https://dl.acm.org/doi/10.1145/3744642
1•ibobev•36m ago•0 comments

Doorbell-interceptor: Using a RTL-SDR dongle to receive signals on 433Mhz

https://github.com/tdbullock/doorbell-interceptor
1•edward•38m ago•0 comments

UnitedHealth's Campaign to Quiet Critics

https://www.nytimes.com/2025/07/12/business/unitedhealth-insurance-criticism.html
2•ceejayoz•44m ago•0 comments

Graph foundation models for relational data

https://research.google/blog/graph-foundation-models-for-relational-data/
3•simonpure•46m ago•1 comments

Sex Differences in Methamphetamine Mortality in the United States

https://www.ajpmonline.org/article/S0749-3797(24)00363-5/fulltext
2•Bluestein•48m ago•0 comments

Mel, Annotated

https://users.cs.utah.edu/~elb/folklore/mel-annotated/mel-annotated.html
1•fanf2•48m ago•0 comments

Voil: Supercharged file editing in VS Code [video]

https://www.youtube.com/watch?v=c_L0c7rcYLs
1•hexomancer•50m ago•1 comments

Giant, flightless bird is next target for de-extinction company

https://www.cnn.com/2025/07/09/science/giant-moa-colossal-biosciences
1•Qem•51m ago•1 comments

Should the Federal Government Sell Land?

https://www.construction-physics.com/p/should-the-federal-government-sell
1•atlasunshrugged•53m ago•0 comments

iPhone Gray Mode – against addiction / distraction

https://trendscout.com/gogrey/
1•ladino•54m ago•0 comments

Early insight into social network structure predicts climbing the social ladder

https://www.science.org/doi/10.1126/sciadv.ads2133
2•PaulHoule•56m ago•0 comments

The Last Run of Canada's Most Stubborn Publisher

https://thewalrus.ca/gaspereau-press/
3•ilamont•59m ago•0 comments

The Fourth Wave: How Speedballing Is Creating a New Kind of Drug Crisis

https://gizmodo.com/the-fourth-wave-how-speedballing-is-creating-a-new-kind-of-drug-crisis-2000627482
2•rntn•1h ago•0 comments

Collaborative Terminal Sessions in the Browser

https://twitter.com/pleasepushh/status/1944008701419172176
1•piyushgupta53•1h ago•0 comments
Open in hackernews

The fish kick may be the fastest subsurface swim stroke yet (2015)

https://nautil.us/is-this-new-swim-stroke-the-fastest-yet-235511/
66•bookofjoe•3h ago

Comments

bryancoxwell•2h ago
Very cool. Should probably have a (2015) though.
cjcenizal•1h ago
Amazing! This is about the dolphin kick performed on its side, rechristened “the fish kick.” I couldn’t fathom (ha) why the same kick rotated 90 degrees could be faster but it turns out that the kicking motion is constrained by the motion of the water around it. In the dolphin kick, the water moves up and down and is limited by the water’s surface and pool’s bottom. The swimmer frees themself of these constraints by turning on their side.
bravesoul2•1h ago
Does that give advantage to those in the middle lanes?
onlypassingthru•1h ago
Any turbulence created by waves and vortices smashing into hard surfaces is going to slow the swimmer down. To paraphrase an old adage, smooth is fast.
analog31•13m ago
Indeed, and as a consequence there are rules for who gets which lane.
MengerSponge•1h ago
(2015 article)

I get that it's a quirk of the sport's history, but it's funny and dumb that swimming awards medals and records for being the fastest at a slower stroke. It's like if track meets would have a 100m sprint, a 100m skip, and a 100m run-backwards.

If I could change things in the world, I wouldn't eliminate the extraneous strokes in swimming, but I would include additional competitions in all the track distances: backwards running, handstand walk, and one-legged hopping.

nkrisc•1h ago
Seeing backwards running races would be impressive. Seeing the fastest human runners is also very impressive, but it’s also less interesting in a sense because they’re doing exactly what our bodies evolved to be able to do. It is interesting to see that ability pushed to its natural limits, but I think it’s a bit more interesting to see people excel in things we didn’t evolve to do: like swimming or running backwards.
bravesoul2•1h ago
Diagonal running!
aleph_minus_one•1h ago
> Seeing backwards running races would be impressive.

For cars, such races seem to exist (have existed?) in the Netherlands:

> Dutch Reverse Racing

> https://www.youtube.com/watch?v=lLgPTJWAysY

These kinds of races seemed to be popular in the Netherlands because DAF (a Dutch manufacturer) produces the Variomatic transmission system

> https://en.wikipedia.org/wiki/Variomatic

"Because the system does not have separate gears, but one (continuously shifting) gear and a separate 'reverse mode' (as opposed to reverse gear), the transmission works in reverse as well, giving it the side effect that one can drive backwards as fast as forwards. As a result, in the former Dutch annual backward driving world championship, the DAFs had to be put in a separate competition because no other car could keep up."

djmips•1h ago
Olympics have different 'strokes' used between sprint, middle distance, long distance, hurdles, steeplechase and walking races - so there is some variety in the locomotion forms unlike your strawman.
nasmorn•1h ago
The walking race is the only one where there are specific rules. The other races just happen to mostly favor a style. Sprint finishes in long distance races are common and legal
bix6•1h ago
Swimming needs a corkscrew race!

Butterfly is my favorite. It’s so fun to fly through the water like that.

adelmotsjr•1h ago
It is also my favorite, despite being the hardest due to the high skill required to do the proper technique. It is so awesome to feel so powerful.
airstrike•1h ago
I can't wait for you to find out there are different kinds of track competitions.
bee_rider•1h ago
It is annoying that rules were added to the “freestyle” race, to preclude these new better underwater forms of swimming. Freestyle ought to mean you are free to pick any style.
mikeytown2•1h ago
The rule is only on the IM; freestyle can't be butterfly, backstroke, or breaststroke.
aleph_minus_one•1h ago
But why do we need this rule if front crawl is faster anyway?
bee_rider•31m ago
IM stands for individual medley so it makes sense that they’d restrict the swimming types in that race
bee_rider•28m ago
They added a rule in 1998, you can only go 15 meters underwater after the flip. Although I guess there are safety concerns, which seems reasonable…
Sharlin•1h ago
Well, race walking is also a thing. And, although not fully analogous, track and field has hurdles.
jccalhoun•56m ago
I think there are too many swimming events in the Olympics. If the same few people win most of the medals then maybe the events are too similar.

Please eliminate two. PS I am NOT a crackpot

wrboyce•34m ago
I couldn’t agree more!
eesmith•35m ago
1500 meter running and 1500 meter race walking are two track events with different ambulatory styles.
nkrisc•1h ago
I thought the comparison to running was interesting. As an almost exclusively terrestrial mammal, there is a very natural way for us to run. No one is going to discover than running on our arms and legs is faster, or something other than ”unnatural” way of running is faster.

But that’s not really the case with swimming. We didn’t evolve a natural swimming instinct or form for speed.

When I learned that (nearly?) all terrestrial mammals can swim to some degree (even ones that look like they shouldn’t be able to - like ungulates), I was a bit surprised, but it’s not too surprising upon reflection. But that got me thinking then: what is the best terrestrial mammalian body plan that also happens to be good for swimming? What terrestrial mammal would also be fast swimmers if they could learn and train for it as humans do? Maybe my thinking is clouded by anthrocentrism, but the human body plan which is good for bipedal running also seems to work out pretty well for swimming.

Of course, top human swimming speeds are pretty terrible compared to human running speeds and the swimming speed of basically any other aquatic animal, but we’re not made for it!

ethan_smith•1h ago
Bears, particularly polar bears, are terrestrial mammals with impressive swimming capabilities - they can swim up to 60 miles without rest and use a modified dog paddle that's remarkably efficient.
CorrectHorseBat•1h ago
>No one is going to discover than running on our arms and legs is faster, or something other than ”unnatural” way of running is faster.

Surprisingly not everyone seems to be convinced of that

https://pmc.ncbi.nlm.nih.gov/articles/PMC4928019/

codingdave•1h ago
I just went down a small rabbit hole, watching some videos of quadrupedal running, and what struck me was how un-balanced the motion looked. Even the guy who is (one of) the world's fastest has this weird twist in his back while he is doing it, to make sure his knees and elbows don't smack together. That may be sustainable when you are young and strong, but I worry this guy, or anyone else who gets into this, is going to be wracked with long-term damage and in a lot of pain when older.
Rendello•1h ago
A few years ago I tried out TikTok and quickly came to see that there are huge niches inside the platform that are barely even searchable or existent outside the app. One of which was these videos of people sprinting or galloping on all fours. It's fascinating and terrifying seeing people who've practiced do the movements, it's uncanny in both how natural and unnatural it can look. It seems to be an intersection of unconventional exercise enthusiasts and furry-types.

Sprinting: https://www.youtube.com/shorts/6S0ctkOixj8

Galloping / jumping: https://old.reddit.com/r/toptalent/comments/ldxsoz/these_peo...

quuxplusone•36m ago
Very cool! Reminds me of Tim Burton's "Planet of the Apes" (2001), which did quadrupedal running with practical effects — harnesses, towed treadmills, all sorts of tricks — i.e., cheating, from the POV of this thread. :)

"Behind the Scenes of Tim Burton's Planet of the Apes": https://www.youtube.com/watch?v=KighzjHkZtY&t=803s "Ape School" starts at 9m35s. Quadrupedal running starts at 13m23s.

quuxplusone•46m ago
Ryuta Kinugasa, Yoshiyuki Usami. "How Fast Can a Human Run? Bipedal vs. Quadrupedal Running." Frontiers of Bioengineering and Biotechnology 4:56 (June 2016).

That looks remarkably like an April Fool's article released at the wrong time of year. The second-to-last paragraph is where they reveal the joke to anyone who wasn't already in on it:

> This study has limitations. Although statistical models are significantly related to mathematical formula [sic], the use of a statistical model to accurately predict future athletic performance is challenging (Hilbe, 2008). Fitted linear models should be treated with some caution. The use of linear regression for world record modeling would yield a continued decline that would eventually become negative, thus suggesting that update of world records can be continued until 0 s. It must also be noted that quadrupedal world records did not exist before 2008. This relatively recent involvement [sic] of quadrupedal running results in a somewhat tenuous comparison of world record times. Therefore, despite a high coefficient of determination, a large diverging confidence interval was found.—

—and then right back into it—

> —The 95% confidence intervals [sic] indicates that projected intersects could occur as early as in 2032 (9.238 s) or as late as 2076 (9.341 s).

A "rebuttal paper" might accept their major premise (i.e. feasibility of "a statistical model to accurately predict future athletic performance") but argue that rather than fitting a straight line (linear regression), we should fit an exponential decay curve (exponential regression). In an appendix, we'd try fitting a hyperbola (y = K1/(x-X0) + K2), taking X0 for quadrupedal running at 2008 and X0 for bipedal running anywhere from 2 million to 10 million years ago.

In an alternative "experimentalist approach," the rebuttal paper's author would actually run 100m himself, first on two legs and then on four; plot these as an additional data point (with x=2025) in each set; and fit a polynomial to that data. This would likely change the conclusion quite drastically. ;)

Etheryte•1h ago
This is a stretch for what you might consider terrestrial, but polar bears swim faster than olympic athletes. Moose also swim hella fast, so funnily enough it's the same guys in water as on land that you have to look out for.
navbaker•14m ago
I had no idea how enormous moose were until I had to go to Fairbanks a few years ago for a work thing. It was unreal sitting in line waiting to move through the gate at the air base and seeing a moose casually running down along the 8 foot fence along the perimeter and realizing it was taller than the fence!
chrisco255•1h ago
Beavers, with their wide flat tails, are very good swimmers. Looking it up though it seems black bears are the fastest overall although I believe beavers are the fastest relative to their body size.
chrisco255•1h ago
The human body plan is also pretty good for climbing. The dynamism of the human body is why we thrive in so many environments.
cratermoon•41m ago
> When I learned that (nearly?) all terrestrial mammals can swim to some degree (even ones that look like they shouldn’t be able to - like ungulates)

Even elephants can swim. https://www.youtube.com/watch?v=HpD40ewOyC4

comrade1234•1h ago
> I reach out to Misty Hyman, who won gold in the 2000 Olympics...

Her name always makes me laugh because I then think about her brother's name: Buster.

bravesoul2•1h ago
Misty could mean smoky too!
GLdRH•1h ago
Have you ever heard of Fanny Chmelar?
maxden•35m ago
In what sport does she compete for Germany? https://www.youtube.com/watch?v=U_Klz5qncZQ
fainpul•1h ago
Reminds me of the fascinating efficiency of fish, where even a dead fish can swim upstream, given the right kind of vortices.

I wonder how much potential for improvement there still is for the human body.

https://fyfluiddynamics.com/2018/07/when-i-was-a-child-my-fa...

swarnie•1h ago
What improvements are you thinking?

I see three avenues:

1) Clothing - Already banned in the Olympics

2) Medication - Also officially banned in the Olympics but the Enhanced Games look like a promising test bed.

3) Go full Cult Mechanicum?

onlypassingthru•55m ago
IIRC, the backstroke races at the 1996 Olympics were pushing the boundaries of human potential as competitors swam some or all of the races underwater. The optics of an underwater race were not good (ha!). As a result, FINA made it mandatory to surface and compete in actual backstroke instead of underwater dolphin kick.
fouronnes3•35m ago
Really would love to see a true freestyle category — with the 15m rule removed. I'm curious why it's not a thing.
onlypassingthru•26m ago
I think the rule was created because underwater racing is not that interesting to watch for spectators and more difficult to officiate from the surface. Maybe all we need is a bunch of GoPros stuck around the pool and we can see a new race category?
aleph_minus_one•20m ago
> I'm curious why it's not a thing.

According to onlypassingthru in https://news.ycombinator.com/item?id=44542370 "The optics of an underwater race were not good".

Additionally consider (as was pointed by swarnie in https://news.ycombinator.com/item?id=44542285 ) that there exist clothing restrictions in Olympic swimming - in my opinion this is also a contradiction to the spirit of "freestyle".