Alejandro Santacreu

Clamo, clamatis, omnes clamamus pro glace lactis == tweets, retweets and likes do not always imply endorsement. ☮️🤟🍦

[Alejandro Santacreu @sirkanda]

- Es una mariposa.
- ¿Y qué son esas cruces?
- Son ventanas a diferentes mundos. Está contenta porque los ha visitado todos y ya ha terminado su reto. El reto era visitar todos los mundos y de todos los mundos coger una gema...
- ¿... como algo que aprendió?
- Sí.

Sofía. 6 años.

[Caolan @CaolanReports]

For weeks, Irish politicians have dodged questions about the refinery in Ireland supplying Russia’s war machine.

So I tracked down government minister Niall Collins at a farming show.

He refuses to back sanctions & his stance was worse than I expected.

Avoidance.

[Markus J. Buehler @ProfBuehlerMIT]

We've made a breakthrough in self-evolving AI scientists moving from "search" to "principled discovery": Scientific discovery requires that the search space itself changes, and an AI scientist must perceive this shift without intervention. We built an AI that achieves this for the first time with the ability to discover the scientific vocabulary it reasons in. Evidence, tools, artifacts, verifiers, failures & claims become typed provenance. We show three distinct modalities: 1) retrieval, adding known objects; 2) search, exploring a fixed schema; and critically: 3) discovery, a verified regime transition.

We solve the open-endedness evaluation problem by lifting agentic workflows into a typed copresheaf and proving, via a Kan obstruction, that true discovery is not unbounded generation but a verifiable schema expansion: old evidence is transported by Left Kan extension, and genuine novelty is mathematically quantified by the pointwise residual beyond the transported image - separating discovery from mere search and making novelty objective and measurable rather than a subjective judgment or benchmark delta.

Our AI scientist is built in a way that does not pre-conceive the approach it chooses; instead, we endow the system with formal power to adapt, evolve, and reason from first principles. Case studies include:
1⃣Builder/Breaker model that discovers mode-conditioned compliance in proteins;
2⃣CategoryScienceClaw that finds anisotropic fiber-network stiffness rules.

Great work in collaboration with my graduate student @fwang108_ @MITdeptofBE

F.Y. Wang & M.J. Buehler, Self-Revising Discovery Systems for Science: A Categorical Framework for Agentic Artificial Intelligence, arXiv:2606.01444, 2026

[Alejandro Santacreu @sirkanda]

@a16z “The world is not made of words.”

True.

But your train of thought is not running on worlds. It is running through words.

World models may ground perception and action.

reflective human-level minds also do something else:

they turn worlds into language, then think inside it.

[Alejandro Santacreu @sirkanda]

@paulg Maybe it’s not style, but friction. AI writing feels costless: no hesitation, no risk, no unresolved human pressure.

StoryScope: Investigating idiosyncrasies in AI fiction
https://t.co/hIthzlUnqm

Apes mad at their own echoes.

[Kevin Baron @DefenseBaron]

"I hate war as only a soldier who has lived it can, only as one who has seen its brutality, its futility, its stupidity." - General Dwight D. Eisenhower

"I am tired and sick of war. Its glory is all moonshine." - General William Tecumseh Sherman

[Arpit Gupta @arpitrage]

Modular things scale better, which explains China’s success in different domains

https://t.co/SiS5baTTcr

[Alejandro Santacreu @sirkanda]

@Gossip_Goblin I love it 😍 - quick style transfer to @alejodorowsky Dune. Blasphemy!

Wouldn’t be amazing to finally bring his vision to life?

[Alejandro Santacreu @sirkanda]

Suomalainen kesä lähestyy rauhallisesti ja ilman minkäänlaista dramatiikkaa.

Espoo tänään vähän ennen klo 8 😅

@meteorologit

[Alejandro Santacreu @sirkanda]

@DanyBittel

[Brett Adcock @adcock_brett]

Watch a team of humanoid robots running a full 8-hr shift at human performance levels. This is fully autonomous running Helix-02 https://t.co/IdZR0T1F5I

[James Tate @JamesTate121]

You can’t really argue this. They believe in investing in the people and infrastructure.

[Gandalv @Microinteracti1]

On one side of the Atlantic, you have a 79-year-old former game show host who believes windmills cause cancer, personally ended a war that hasn’t ended, and that crowd sizes at his inauguration defied the known laws of mathematics.

On the other side, you have a 72-year-old ex-KGB man who has just accused Finland of secretly plotting to invade Russia.

Finland. Famous for saunas, reindeer, and minding their own business since approximately the Bronze Age.

Putin’s reasoning, delivered with the solemn authority of a man who hasn’t slept since 2003, was this: Finland joined NATO because they were waiting. Biding their time. Lurking. Ready to swoop in and grab Russian territory the moment Russia collapsed.
“Swoop in and grab what they could,” he said.

This is a man who sent 200,000 troops across an internationally recognised border, seized territory by force, and has spent four years reducing Ukrainian cities to rubble. Describing someone else as the type who swoops in and grabs what they can.

The psychological term is projection. The clinical term is considerably less polite.

Meanwhile, across the ocean, the other one is imposing tariffs on islands inhabited exclusively by penguins and receiving world leaders at a golf club in Florida as though the White House is simply too far to drive.

Two old men. Two fantasy worlds. Zero connection to observable reality.
The Cold War at least had the decency to be frightening. This is just embarrassing.

When your entire worldview runs on paranoia, grievance, and whatever the Kremlin version of Fox News feeds you at 3am, a fence looks like an invasion. A neighbour looks like a threat. And five million Finns quietly getting on with their lives looks like a geopolitical conspiracy.

[Neil Stone @DrNeilStone]

I can't figure out if vaccines work or not.

Tough one.

Need Sherlock Holmes on this one.

[Alejandro Santacreu @sirkanda]

@zan2434 #SPV #AngelList #RepublicEurope

[Linus @thesephist]

Hard to unsee the future from demos like this

[Aaron Rupar @atrupar]

i had to triple check that this wasn't from a parody account

[Zain Shah @zan2434]

Imagine every pixel on your screen, streamed live directly from a model. No HTML, no layout engine, no code. Just exactly what you want to see.

@eddiejiao_obj, @drewocarr and I built a prototype to see how this could actually work, and set out to make it real. We're calling it Flipbook. (1/5)

[Alejandro Santacreu @sirkanda]

@oldstocky

[Alejandro Santacreu @sirkanda]

What a time to be alive

[Seth Howes @SethSHowes]

I sequenced my genome at home, on my kitchen table.

I wrote up exactly how I did it - the equipment, protocol, theory, and cost:

https://t.co/Nkjqaho2zm

[Seth Howes @SethSHowes]

I sequenced my genome at home, on my kitchen table.

I wrote up exactly how I did it - the equipment, protocol, theory, and cost:

https://t.co/Nkjqaho2zm