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π 2026-06-30 01:01 in Paris, Sciencemuseums
I had been there before of course, but it had been aroudn 30 years since my first time, when it opened and La Géode was a super cool IMAX theatre, one of the first ones in the world. It had been a while and I figured I'd go check it out again. The IMAX theatre is a bit small by today's standards, but still cool and I got to see 2 movies there:



the argonaut sub is still there
the argonaut sub is still there

Then I went to visit the first 2 floors of Citée des Scicences (ground and basements aren't actually part of the exhibits):


they still have an official kg
they still have an official kg

you handle those carefully to avoid adding weight to them
you handle those carefully to avoid adding weight to them

The rest of the exhibits, enough for at least 4H if you go through them carefully:


































π 2026-06-25 01:01 in Museums, Poland, Poland2023, Sciencemuseums
i learned in Betchley Park that the first versions of German Enigma machine were actually cracked by Polish Mathematicians from the university of Poznan. One of them was able to figure out patterns on how the machine work and eventually help create a machine that could decrypt the messages of the day after trying enough combinations with a machine that would automate the process.
The museum does a good job explaning how different kinds of encryption have worked over the years, and then explained how enigma worked and showed the machine they built in the end to crack it on a daily basis.









the mathematicians that did the job
the mathematicians that did the job

part of the machine that helped decode the sequence in the day's encryption key
part of the machine that helped decode the sequence in the day's encryption key




and the full machine that was used for the daily decryption
and the full machine that was used for the daily decryption

later enigma was improved with a 5th rotor and an even bigger machine had to build in the UK by Betchley park to crack that
later enigma was improved with a 5th rotor and an even bigger machine had to build in the UK by Betchley park to crack that

the next machines that did the work during WWII
the next machines that did the work during WWII

See more images for Poznan Enigma Encryption Museum
π 2026-06-19 01:01 in Computers, Poland, Poland2023, Sciencemuseums
I went to three vintage computer museums, 2 across the street from one another in Warsaw, and a 3rd one in Poznan. They were all fun to visit but the 2nd one in Warsaw was manned by someone who didn't speak much but Polish, however he had one of the most impressive private collections I've seen, including some expansion boards that allowed improving the old computers like Amstrad CPC with extra resident commands, a newer Basic, and a bunch of games you could run instantly via flash instead of a slow load from floppy, or an even slower load from tape (those were sometimes 10mn or more).

The first one was fun:







But nothing compared to the second one, the highlight by far, hidden in a subway tunnel:



I immediately noticed the expansion board that was used to instantly load games
I immediately noticed the expansion board that was used to instantly load games

and I remember playing this game as a kid
and I remember playing this game as a kid

this was the magic board which has its own computer and flash, kudos to whoever designed it
this was the magic board which has its own computer and flash, kudos to whoever designed it



and my second computer I spent so much time with
and my second computer I spent so much time with

a cute baby version of it
a cute baby version of it



a pristine version of my Amstrad CPC 464 with the correct colors, QWERTY and tape player
a pristine version of my Amstrad CPC 464 with the correct colors, QWERTY and tape player


I had heard about the atari TT but never seen one! It had a built in hard drive!
I had heard about the atari TT but never seen one! It had a built in hard drive!

I still have that exact spare SIM 9 bit RAM at home :)
I still have that exact spare SIM 9 bit RAM at home :)


and more
and more





the famous Atari ET was featured
the famous Atari ET was featured

Atari 260ST, I had never heard of it! It's a rare machine that pre-dated the 512 STF
Atari 260ST, I had never heard of it! It's a rare machine that pre-dated the 512 STF

Amstrads had to sell as Schneider in Germany
Amstrads had to sell as Schneider in Germany

this is another rare one I had never heard of and could accept game cartridges
this is another rare one I had never heard of and could accept game cartridges

someone made an updated DOS in 2015, 30 years later!
someone made an updated DOS in 2015, 30 years later!

I had no fun at all ;)
I had no fun at all ;)

the more boring PCs that killed all our joyous fun computers
the more boring PCs that killed all our joyous fun computers


an Atari 65XE, before my time. an Atari 800 era 8bit CPU
an Atari 65XE, before my time. an Atari 800 era 8bit CPU

This was honestly the best private vintage computer museum I've seen in the world. Big props to the engineer who has maintained that collection.

A few days later, In Poznan, there was also an old computer and video game museum. It didn't compare, but fur kids they had enough video games running:





π 2026-05-13 01:01 in Museums, Sciencemuseums, Vegas
It had been many years since I had been there (just looked it up, 13 years actually), so I aksed Gemini if there were new exhibits, and it said "absolutely, worth going back", and it was true, glad I went back


New room showing in details the differences between the 2 bombs and how they were made:











Other fission powered vehicles:


nuclear planes were tried, but it never happened
nuclear planes were tried, but it never happened

same thing for nuclear cars
same thing for nuclear cars

And then the big bonus for me was the fallout exhibit. I had no idea it was a series of video games first:







Then went to see the rest of the regular museum I had already seen:





It's a fantastic museum, so glad I went back.

π 2025-11-29 01:01 in Computers, Sciencemuseums
I randomly happened to be a the CHM to drop off some donations, and noticed a room I didn't remember and found out they now had a fully working IBM 1402 (actually they had two).


















Video demo:

π 2025-08-26 01:01 in Sciencemuseums
The highlight of Geneva, was definitely visiting CERN. I had done some research on how to get one of the guided tours but the info I got was out of date, so I missed the fact that the first slot was now given at 08:30 and not 09:00. Thankfully I was able to get a later slot, so things worked out:










Then the guided tour started:



LHC was built on earlier smaller rings that got bigger over time
LHC was built on earlier smaller rings that got bigger over time

I still remember learning in school how this larger ring was being built, the biggest in the world, and one day would be turned on
I still remember learning in school how this larger ring was being built, the biggest in the world, and one day would be turned on



this culminated in Dr Higgs having his boson found and confirmed to exist, what a great achievement
this culminated in Dr Higgs having his boson found and confirmed to exist, what a great achievement







and the best part of the tour was to be able to observe the control room that was indeed being used for real science that day (sometimes LHC is shut down for upgrades or maintenance):







Then they had some small science show/activites that were no essential, but since I was all the way there, I figured I'd check out anyway:



See more images for Geneva's CERN Visit

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