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The NASA/ESA Mars Sample Return mission has been canceled

https://www.science.org/content/article/nasa-s-mars-sample-return-mission-dead
129•Muhammad523•1h ago•72 comments

Xiaomi MiMo v2.6

https://mimo.xiaomi.com/mimo-v2-6
75•volf_•28m ago•13 comments

What Sun got wrong

https://bcantrill.dtrace.org/2026/09/20/what-sun-got-wrong/
409•chmaynard•6h ago•228 comments

Attention is all you have

https://alicegg.tech/2026/09/21/attention
429•zer0tonin•6h ago•127 comments

AI coding has made CI a bottleneck, so we reworked ours to keep up

https://linear.app/now/ci-bottleneck-reworked
37•julian_digital•1h ago•19 comments

Why does mathmain need an encrypted loader?

https://safedep.io/mathmain-encrypted-loader/
71•abhisek•2h ago•16 comments

The Advisory Group on Mathematics and Artificial Intelligence

https://terrytao.wordpress.com/2026/09/21/advisory-group-on-mathematics-and-artificial-intelligence/
28•digital55•1h ago•11 comments

Turn off and restrict access to Apple Intelligence features on Mac

https://support.apple.com/guide/mac-help/turn-restrict-access-apple-intelligence-mchlb2e44f94/mac
158•alwillis•3h ago•96 comments

In Search of a Compositional Theory of Self-Stabilization

http://muratbuffalo.blogspot.com/2026/09/in-search-of-compositional-theory-of.html
25•matt_d•1h ago•1 comments

Transformers Explained Visually

https://poloclub.github.io/transformer-explainer/
9•aray07•56m ago•0 comments

Grok 4.7

https://x.ai/news/grok-4-7
385•meetpateltech•4h ago•328 comments

Apple Copland D11E4 Booting in the Browser

https://www.pagetable.com/300
24•luu•2h ago•2 comments

Advisory Group on Mathematics and Artificial Intelligence

https://openai.com/index/advisory-group-on-mathematics-and-ai/
57•js73js8•3h ago•39 comments

Divide by Depth for Instant 3D

https://gabrieloc.com/2026/09/15/perspective.html
6•gabrieloc•2d ago•1 comments

US halts flights at busy East Coast airports, says fiber line cut

https://www.reuters.com/world/us/faa-halts-some-us-east-coast-flights-due-communication-issues-20...
109•allanbreyes•1h ago•67 comments

Frontier AI on Your Own Hardware

https://timdettmers.com/2026/09/21/dlab-open-source-week/
18•pretext•1h ago•2 comments

A restored PDP-11/83 serving this page on 211BSD Unix

http://pdp1173.com/
73•davepl•4h ago•26 comments

This Digital Radio Gets Messages to the World’s Remotest Locations

https://spectrum.ieee.org/hermes-shortwave-radio-digital-data
57•SamuraiLion•4h ago•31 comments

Kev: Tiny Jev-like family of decision models built on top of Qwen3.5

https://github.com/jaredpalmer/kev/tree/main
352•tosh•13h ago•163 comments

Python Workers are now generally available

https://blog.cloudflare.com/python-workers-ga/
139•torutofu•7h ago•18 comments

Avoiding the babbling-idiot failure in a time-triggered communication system

https://ieeexplore.ieee.org/document/689473
17•ronfriedhaber•2h ago•5 comments

How do Traffic Signals Work (2019)

https://practical.engineering/blog/2019/5/11/how-do-traffic-signals-work
39•at1as•4h ago•27 comments

Fable 5 – Median thinking declined in August

https://twitter.com/Lon/status/2101793422487204027
274•espeed•4h ago•184 comments

Grim Fandango Puzzle Document (1996) [pdf]

http://gameshelf.jmac.org/2008/11/13/GrimPuzzleDoc_small.pdf
344•kelseyfrog•14h ago•83 comments

Show HN: A website that tracks US food prices every day

https://www.kadoa.com/food-prices
6•hubraumhugo•1h ago•0 comments

M5 Ultra Mac Studio Review

https://www.macstories.net/stories/m5-ultra-mac-studio-review-the-dream-mac-for-local-ai-agents/
202•piotrgrabowski•6h ago•188 comments

RoboHarm: Do Frontier Robot Policies Refuse Unsafe Instructions?

https://robocurve.org/roboharm/
4•msadowski•1h ago•0 comments

Noodle Gallery- Open-source, self-hosted alternative to Google Photos and Immich

https://digitalescapetools.com/tools/noodlegallery.html
40•xabd•6h ago•28 comments

macOS 27: Workaround to avoid downloading AI models and save storage

https://www.reddit.com/r/MacOSBeta/comments/1vlnf13/workaround_to_avoid_downloading_ai_models_and/
169•ano-ther•6h ago•77 comments

Heretic removes restrictions from language models

https://heretic-project.org/
206•Bluestein•16h ago•87 comments
Open in hackernews

The NASA/ESA Mars Sample Return mission has been canceled

https://www.science.org/content/article/nasa-s-mars-sample-return-mission-dead
128•Muhammad523•1h ago

Comments

peri-cl•1h ago
https://archive.is/YYx0d
whalesalad•59m ago
My brother in law (JPL) was telling me about this earlier in August. Big letdown but he assured me that they'll come back to earth some day ... just gonna sit up there a long time.
peri-cl•55m ago
This article only obliquely mentions in the last paragraphs, but there's a parallel Chinese program that recently brought back samples from the moon, and will attempt Mars sample return, launching in 2028,

https://en.wikipedia.org/wiki/Tianwen-3

reaperducer•53m ago
it's just that NASA has given up on being the one to do it first.

No need to. Mars delivers:

https://www.nytimes.com/2026/09/20/arts/who-owns-this-chunk-...

notabee•49m ago
Anyone wanting to be involved in the future of scientific research should probably start learning Mandarin. We're going the way of the Soviets, where political officers will quash any science that doesn't fit their ideology. https://arstechnica.com/science/2026/09/trump-planning-to-ha...
walrus01•20m ago
https://thegoodshirts.com/products/hello-i-am-fleeing-the-am...
Fraterkes•19m ago
Do we really need to frame China’s succes here in terms of American decline? Do you think everyone outside the US views the moonlanding as a black page in history?

It’s fine to talk about a “race” if jingoism is the thing that gets most people on board with funding Nasa. But we ought to know better.

anamexis•14m ago
> Do you think everyone outside the US views the moonlanding as a black page in history?

Former Soviet people might...

frmersdog•11m ago
Everyone under the age of 45 has a right to be pissed at the way things have gone. They inherited a shitshow that they never had any real power to stop or fix.

Boomers and Silents (and, to a lesser and understandable extent re: Challenger, Gen X) should be ashamed, though.

I get harangued every time I point the finger, but for Pete's sake, Millennials didn't do this. Millennials wanted to go to Space Camp. It has to be SOMEONE'S fault. SOMEONE take responsibility.

Muhammad523•46m ago
I think that the scientific community really doesn't care about who will bring the samples back, but simply wheter someone will do it and share them with the world
lukeify•42m ago
The NASA/ESA MSR was of substantially higher quality, mind you. The M2020 rover specifically picked up samples of high scientific value to be returned. The Chinese return mission will only return what it finds from its direct landing site.
XorNot•32m ago
It's not like they're going to do it only once though, and some is a lot more then zero.
ok_dad•19m ago
It would be cool if NASA worked with the Chinese agency to collect those cores using their rocket, it would be a win win.
duskwuff•4m ago
Unfortunately, they can't:

https://en.wikipedia.org/wiki/Wolf_Amendment

jmclnx•39m ago
> it's rather that NASA has (?) given up on being the one to do it first

I think the Trump admin decided since it will not make them a profit, like other scientific research already canceled, it is not worth doing.

GolfPopper•36m ago
"Profit" is too generous a motive. It didn't service the Big Man's ego, so it's gone. That they can do some damage by killing it just makes it sweeter. Trump is Teemu Saruman.
titzer•19m ago
The way things look, everyone in Trump's orbit is just grifting off the government directly or using it to their personal advantage, including his own children. He literally said "Every time my kids invest in a stock, they have inside information."
q_andrew•54m ago
This is so disappointing. The closest thing we ever discovered to life on other planets and the US won't even put 0.5% of budget towards retrieving it.
DiggyJohnson•53m ago
That would be a MASSIVE portion of the budget for a single discretionary item.
q_andrew•50m ago
I guess I should clarify, I meant 0.5% to NASA in general. Right now it's 0.33%. In 2002 it was 0.72%.
TedDoesntTalk•18m ago
The article says $11 billion. That’s ridiculous.
9dev•11m ago
…ridiculously low compared to a Defense budget of $1500 billion? Agreed.
carabiner•47m ago
We cannot cancel anything ever because each program is only 0.001% of the federal budget. To do so would be stingy.
sophacles•33m ago
Or we could look at the utterly stupid things, like maybe stop having a failed war in Iran, and just not pay for those? Thats a very big chunk of budget. As a bonus it would bring gas prices down, reduce future spending in VA and other combat veteran costs, and just possible help make the case for reducing the size and expense of our military (while still maintaining the 2 largest air forces in the world).
Imnimo•50m ago
I never really understood why you'd have Perseverance drill the cores and then just leave them on the ground for an underdefined future mission to retrieve.
q_andrew•49m ago
Because the powers that be would have deemed a real plan as too expensive.
petcat•35m ago
> would have deemed a real plan as too expensive

Who are these "powers that be"? And do they have an infinite credit card? Could they really just do whatever they want and for some reason they choose not to?

q_andrew•19m ago
The powers that be are the US federal government. Their credit card is extremely large, but that money is going towards wars and weapons.
psadauskas•19m ago
Yes. They decided that it was more valuable spending a trillion dollars bombing people halfway around the world (and enriching weapons companies in the process) than it would be to spend a few billion advancing science.
petcat•6m ago
NASA's budget is $24 billion this year. That's substantially larger than even Trump asked for, which was $16 billion. For reference, the ESA, the entirety of the EU's budget for space exploration and enterprise: $8 billion.

USA has two goddamn robots on Mars. And multiple others orbiting the planet itself. And also a couple that have left our solar system.

mring33621•48m ago
My bet is that the new Trump-flavored NASA still wants to do this, but without the Europeans.
LorenDB•41m ago
Knowing Jared Isaacman, he won't let MSR die without a fight. It wouldn't shock me to see NASA consider Rocket Lab's MSR proposal; they had submitted a pretty affordable proposal some time ago.
wood_spirit•21m ago
Yes the administration warned American space companies not to attend the international space summit in France last week because it was international cooperation. NASA attended.
jumploops•47m ago
I worked on (a very small part of) the ExoMars rover (now called the Rosalind Franklin[0]).

It was supposed to launch in 2018, then was pushed to the early 2020s on a Russian rocket. For obvious reasons, it got pushed again, now launching in 2028.

The state of the world isn't great for space exploration, but I'm hopeful this mission will be revived at some point in the future.

[0]https://en.wikipedia.org/wiki/Rosalind_Franklin_(rover)

Muhammad523•45m ago
I'm curious to know on which part you worked on, could you tell us?
Teever•39m ago
As an outsider who is very interested in space exploration I'm very flummoxed by the state of space exploration.

With the price of launches so low compared to only 20 years ago due to advancements in launch technology and the increased cadence of launches it seems like it should be easier to do these kinds of missions and that there should be more, cheaper missions that are willing to take risks because the per mission cost is so much lower.

Can you comment on why that doesn't seem to be happening? Why aren't we covering Mars in cheap rovers and satellites?

LetsGetTechnicl•25m ago
Probably has something to do with the recent anti-science movement that currently has our country and government in a chokehold.
nomel•25m ago
throw0101c•47m ago
Howtown had a video on this a few weeks ago:

* https://www.youtube.com/watch?v=zvCgC1yA7_w

sertyrion•42m ago
That article is from January 6 2026. Not sure why it is being surfaced now.
Muhammad523•15m ago
I read it today and found it interesting, i was unaware of the fact that the mission had been canceled
Aboutplants•30m ago
For better or worse it won’t be long until we get private exploration for minerals and water on the Moon and nearby planets, at a relatively decent scale (in comparative terms)
hackingonempty•28m ago
The USA can't afford to waste money shipping a bunch of rocks halfway across the Solar system just so some woke geeks can speculate if Mars in the past could have supported transgender athletes.

It would jeopardize important national security projects like the White House Ballroom, the Triumphal Arch, the Garden of Heroes and National Golf Course, and of course the Donald J. Trump Center for The Performing Arts (formerly The Memorial To That Loser That Got Assassinated.)

TedDoesntTalk•20m ago
Although I don’t agree with your phrasing, $11 billion to bring back some rocks when we have a $40+ trillion deficit makes no sense.
9dev•7m ago
Sure does. R&D investments have a massively larger RoI than military spending - and you won’t be paying off that debt by trying to be frugal. The only way is forward, and bombing schools in Iran isn’t that. It might not be Mars either, but at the very least some interesting science falls out of it, and perhaps some interesting products out of that.
Muhammad523•12m ago
I was reading this outraged until i realized you were being sarcastic, lol
MiloLeo•11m ago
After reading this comment I think it would be worth 11 billion dollars just to get you off this forum.
ortusdux•27m ago
I think the original plan was to land another rover, which would drive to each sample. I hope future plans weight the use of helicopters for retrieval after Ingenuity's success. It looks like the sample capsules weigh less than 3oz.
infamouscow•19m ago
ALIENS! The alternative is just a bummer, so just let me live in delusion here, okay?
raverbashing•18m ago
Honestly this is not surprising, and as much as politics suck, the rocket equation sucks harder

Mars has a little bit less gravity than Earth

How big would a rocket need to be even to send a small payload (let's think 20kg/45lb) even suborbitally so that it can be caught by another spaceship

Now check how big a rocket has to be to send all of that from Earth

You'd probably have to send this on Starship. And refuel it while on orbit

trebligdivad•17m ago
The Japanese 'Martian Moons exploration' mission is launching to Phobos next month and doing a sample return; how hard would a martian to phobos sample moving mission be that could then be collected off Phobos sometime?
Muhammad523•10m ago
The James Webb Space Telescope had a $10 dollar price tag, why wasn't it considered too expensive at the time?
wmf•6m ago
Costs increased after it was already under construction so sunk costs kicked in. MSR was still in the planning stages when it was canceled.
dclowd9901•3m ago
It's hard to imagine, since the moonlandings, if America kept its pace in space exploration, how far ahead of everyone else it would be, but also how far along everyone else would be. America was the catalyst for the impossible in that era, and then we decided to abandon it for... basically nothing. Enriching corporations, I guess?
gamblor956•17m ago
where political officers will quash any science that doesn't fit their ideology

China also does this. We just don't hear about it because they also quash the reporting.

walrus01•13m ago
Those responsible for reporting on the quashing of the reporting have been quashed.
drstewart•11m ago
At least we definitely know they shouldn't be learning German or French
amarcheschi•8m ago
A few hours ago I was looking for some food safety information, found a US gov website posted on reddit and

The website wasn't available anymore

method_capital•29m ago
That'd be a strawman.

What makes you think the poster you responded to agrees with the Iran war expense? He simply commented on how difficult it is to cut anything from the Federal budget. He's right. Remember when all the lunatics were out keying Teslas a few short months ago?

drstewart•8m ago
Or we could reduce Medicaid fraud instead. Why are you pro fraud?
GardenLetter27•32m ago
And Europe is even worse, it's embarrassing.
giantrobot•8m ago
The war in Iran costs about $95m a day and is already over $43b cost to the taxpayers, just in military spending. That's nearly two NASA budgets in just over 200 days.

The "powers that be" chose to lose a completely optional and ill-conceived war on your dime. Instead of science or helping people they decided to spend money blowing up schoolgirls.

Sharlin•2m ago
The entity that has exclusive power over the US federal budget, and thus NASA budget, is called the Congress.
nomel•19m ago
Or, it's simply cheaper to send the equipment to analyze the samples in the rover, than to send the samples back.
Muhammad523•38m ago
Perseverance, obivously, has onboard instruments to analize the samples before dumping them on the ground
yabones•23m ago
An all-in-one solution would be far too heavy. Splitting the tasks up makes a lot of sense. Having all the equipment onboard to drill cores, quickly analyze them, decide if they're worth keeping, and then putting samples in containers is enough work for one rover.

* Storing all the samples onboard means a larger and heavier rover

* Mass budget squeeze means no more helicopter

* The return requires a ground launch from mars, so no more SkyCrane delivery system

We've had 8 launches in the past 3 years, with only 10 in the combined 17 years before [1].

Seems that the reduced cost is being taken advantage of. And, make sure to exclude the drastic reduction in non-lunar launches in your cost comparison for lunar launches.

[1] https://en.wikipedia.org/wiki/List_of_missions_to_the_Moon#2...

giantrobot•13m ago
Some types of launches to some classes or orbits have gotten cheaper. Not all launches to all orbits. I don't know if any commercial launch services can even do planetary transfer orbits.

In space everything is an orbital change. To change orbits you need to speed up and slow down, all of that requires fuel. Even using what are known as "low energy" trajectories that use a bunch of gravitational slingshots need velocity changes to adjust trajectories to get the right angle of approach to some large body.

Most commercial launch services focus on LEO because the secondary stages don't need to carry much fuel and their engines only need to fire reliably once to get into a stable orbit.

A planetary transfer requires multiple engine firings. That's much harder than a single reliable firing. It's not impossible but the testing and engineering is expensive.

A science mission often needs to beg, borrow, and steal to get built. There's one shot to accomplish the mission objectives. That's more expensive engineering and testing. Some mission profiles require specific planetary alignments with very narrow launch windows to boot. So there's a lot of expensive work made more expensive by a tight deadline.

The actual marginal cost of the rocket, fuel, and launch is a very small part of the mission cost. Halving the launch price doesn't necessarily affect the cost of anything else.

Starlink satellites are effectively disposable. If a Falcon 9 explodes or fails to get the second stage to orbit they're out maybe a few tens of millions of dollars. If a science mission has some mission-killing failure there's no funding for a do-over.

nancyminusone•6m ago
For both operating mars rovers, the launch vehicle cost was about 10% of the total. So even if the providers paid you to launch, you'll still be picking up 80% of the remainder. Cut the development cost by 10x? Still in the hundred million dollar range. So still only large goverments can afford. And none of them would approve a bunch of rovers, they'd just see a discount on the one rover they already don't want to give you - "you have one, isn't that enough? Why do you need two?"
fireflymetavrse•20m ago
Beyond earth orbit launches actually is not that low [1]. MSR has a long history of revival and cancellation.

[1] https://spacestatsonline.com/launches/beo