Wanna see a magic trick?

Congratulations to Dr Roman Calpe on yesterdays defense! He and his opponent Prof Anttu had a very nice discussion on various topics, and the adter party was a blast!

36 years ago today, 14 women, most of whom were studying engineering, were killed by an anti-feminist gun man at École Polytechnique in Montreal. I was a young graduate student studying physics at the time and I will never forget. #MontrealMassacre #NeverForget 🧪 👩‍🔬 ⚛️ 🎢 #AcademicSky 🇨🇦

Dear Google, I just want the cloud storage. If I wanted AI crap, I would buy AI crap. Sincerely, Fuck off

How Trump still has 36% approval is beyond me

@profanity.accountant give me the numbers

Prediction: the AI bubble will burst during 2026. This will greatly strain especially the US economy, which is already weak due to Trump. There will be a world wide financial crisis that makes 2008 look cute.

You’ve been kidnapped. The characters from the last TV show you watched are trying to rescue you. Who’s coming to save you? I think I'll be fine. Probably. Eventually.

Feeling cute, might delete later

From the blog archive: 1975: The year that quantum mechanics met gravity! skullsinthestars.com/2015/05/20/1...

When pregnant woman boarded a subway car, 38% of the time someone offered her a seat. If someone dressed as Batman was also in the car it rose to 68%. phys.org/news/2025-11...

This has been a long time coming, but our latest work is finally out in Laser & Photonics Reviews! A real great effort by our PhD students, Janne Heikkinen, Roman Calpe, and Laura Yrjänheikki. They were able to achieve modelocking in nanolasers! onlinelibrary.wiley.com/doi/10.1002/...

“There’re about a thousand of us.”

Done and done. Maybe this time it will be successful? I dunno, but I have a good feeling about this one! Good luck to fellow applicants 🫡 #RCF #GrantProposal

how did i go so long not knowing we were literally teaching people to read wrong. i knew something wasn't right but jesus christ www.apmreports.org/episode/2019...

This was enlightening, and explains SO MUCH of the situation in the US. They literally don't teach kids to read properly!

I knew nothing about James Watson before his death (apart from the whole structure of DNA debacle). But now I know that he was not a good man, not by a long shot.

The Microsoft Authenticator app chooses the numbers 69 suspiciously often...

Domesticated animals have pulled our heavy carts and turned our large mills for centuries. But what about the opposite end of the spectrum—what if the wheel you want to turn is so small you can’t see it? Turns out we can harness the power of bacteria to power the world’s smallest machines. 1/7 ⚛️🧪

Made some lasagne today 😋 Wife loved it, the kids ate everything, and even the cat tried to eat it. Great success 🤌

The more I watch this video, the more confusing it gets

This years carrot harvest, about 2 kg from a plot of land that is less than 1 m²! The older I get, the more convinced I am that plants are magic. They are magic and practically zombies.

Importantly: who would want this? This is duuumb

Loving the Swedish accent of the Nobel announcer :D

In hindsight, maybe it was a bad thing to have some random protocol engineer as the CEO of a social media company.

The work o geometric phase is long overdue for a Nobel prize in physics, but so are many others. Will be interesting to see who gets it tomorrow.

Losing my mind suspecting everything is AI

We are thrilled to announce that our NEW Large Language Model will be released on 11.18.25.

Btw, all "AI art" will be met with a swift block.

Was looking up cabbage recipes and encountered the *cabbage lasagne* where the lasagna sheets have been replaced with cabbage. While the whole "Italian food police" thing is ridiculous, I would still like to take a moment to apologize to all Italians out there.

hey do you mind just feeding all of your personal information into the black box we're just here to help we promise 🥺👉👈

Following @auschwitzmemorial.bsky.social is hard. Everyday I see photos of people who perished in the camp. People of all ages. But every now and then there's a survivor, and seeing that makes me happy 🙂

12 September 1924 | A Hungarian Jew, Tibor "Ted” Bolgar, was born in Sárospatak. In June 1944, he was deported to #Auschwitz from where he was taken to other camps. He was liberated during a death march from Muhldorf. Today he turns 101. Join us in wishing him a happy birthday.

Our kids like to give treats to the cat, especially cheese. This morning our kitchen is a field of cheese...

I'm a bit late in posting this, but an explainer video of the Horizon project where I'm currently involved in as a partner has been published! In short, we are trying to build a new system for lithography that is cheaper and can support 3D patterning. 💡🧪 www.youtube.com/watch?v=XAQt...

Wars against the laws of nature have historically had such great success rates. edition.cnn.com/2025/08/01/p...

This, by comedy duo The Exploding Heads, is the only explanation of AI that you’ll ever need.

I have been in the PI business long enough to know she was trouble the moment she walked in. “Have a seat” I told her. But she fidgeted like a cat on a hot tin roof, never at one place. “I have lost some valuable information” she said, “at a joint they call the Black Hole.” 🧪⚛️🧵

Post a song from the year you turned 12 youtu.be/3YxaaGgTQYM?...

So Elon successfully created MechaHitler, which produces text like a 14-year-old edgelord. Just like it's creator.

My 4-year-old was just bathing and asked me: "why is foam white when soap bubbles are transparent?" Then we had a very nice (and age appropriate) discussion about multiple scattering. So proud of my little nerd 🥰

Can't get up... oh well, happy #caturday!

Went to see the Van Gogh Alive immersive art experience, and I must say it was very impressive. It was as if we were inside the art, through which we could experience the inner workings of Van Goghs mind. Highly recommended!

Over 100 000 people in Helsinki pride parade yesterday! 😁 pride.fi/en/

Elon is now rejecting reality and substituting his own bullshit to stroke his ego. The stupidest people on the stupidest timeline doing the stupidest fucking shit imaginable.

Holy shit, this is the most viewed paper in JOSA A at the moment, and it has been downloaded over 1300 times in the past 24 hours 😳

Chatbots — LLMs — do not know facts and are not designed to be able to accurately answer factual questions. They are designed to find and mimic patterns of words, probabilistically. When they’re “right” it’s because correct things are often written down, so those patterns are frequent. That’s all.

Our newest paper just came online: opg.optica.org/josaa/fullte... 💡🧪 We talk about a fundamental property of light, cross-spectral purity. Doesn't ring a bell? You are not alone! Although the concept was introduced by Leonard Mandel over 70 years ago, it has remained mostly unknown.

Suomi mainittu! Torille! (Basically: "Finland mentioned! To the town square!" ...It's a Finnish thing)