
Crocheted astronaut. Unofficially supporting @astro_timpeake on #Principia mission. Usually found in the company of @mrsdenyer. Taller in real life! #STEM insta
Joined November 2016
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The Crochet Tim retweeted
Here is a beautiful list! 125 free math textbooks, written by the mathematicians who teach the courses and shared on their own university pages. No sign-up, no paywall, no pirated copies. From high school algebra to graduate analysis. 👇
abakcus.com/book-lists/free-…
The Crochet Tim retweeted
What a great resource I’ve just been sent. Thank you @Dublinate
You just type in your surname and you can see where it’s historically and recently found in GB, associated first names, ethnic origin, characteristics of the areas etc.
apps.geods.ac.uk/gbnames/
The Crochet Tim retweeted
Our team, our local program partners, and every operational partner who helps make this program possible each month are heartbroken at the loss of our founder, Dolly Parton. (cont.)
The Crochet Tim retweeted
Sicily has a four-legged early warning system for Mount Etna. It has a beard, it eats gorse, and it is beating several million euros of monitoring equipment by half a day.
The shepherds have known this for as long as anyone has kept goats on that mountain. The herd tells you. No drama about it, no bleating, no rearing up and pointing at the summit. They simply decline to go up the hill that morning, and if the goats will not go up, neither do you. Oldest volcano warning system in Europe. Costs nothing. Runs on scrub.
For most of history the scientific response to this has been a polite nod and a change of subject.
Then in 2011 a German turned up with a box of trackers.
Martin Wikelski of the Max Planck Institute of Animal Behaviour has an unfashionable habit of asking local people what they already know before deciding they are simple. He collared goats living year-round on the slopes and started logging where they went, and when, and how fast.
On 4 January 2012 the data went peculiar. The animals turned down the high pastures they use every day of their lives, all of them, and headed for the trees. The seismometers were quiet. The gas monitors were quiet. In a control room in Catania, a great deal of very expensive equipment was reporting a perfectly ordinary Wednesday.
That evening Etna started throwing lava and ash into the sky.
Six hours.
The same signature has now turned up before eight major eruptions, and at the extreme the goats move fourteen hours ahead of the mountain. Ahead of the tremor. Ahead of the gas. Ahead of everything the volcanologists are paid to watch.
Nobody knows how they do it. The best guess is sulphur dioxide and hydrogen sulphide venting beforehand at concentrations no human nose could ever find, which would mean the animals are smelling the future and declining to comment. Wikelski's own summary is that they know in advance, we have no idea how, but they do.
The institute says there is not yet enough data for a formal warning system. More eruptions, more animals, more species. Which is the correct scientific answer and a very funny one, since the shepherds reached sufficient confidence somewhere around the Bronze Age and have been acting on it every day since.
Rome had geese who saved the city by making a racket when the Gauls came over the wall, and honoured them for it every year afterwards.
Etna has their spiritual successors, doing the same job by refusing to walk uphill.
We have a word in English for a man who behaves like a goat. It means he eats anything, wrecks anything, and understands nothing.
The goat currently outperforms a seismograph.
The Crochet Tim retweeted
Before radar existed, Britain built concrete acoustic mirrors to listen for enemy aircraft. These large curved structures, also known as listening ears, focused engine noise to a central point where a human operator or microphone could detect it. The idea was pursued by physicist William Sansome Tucker of the Royal Engineers, and the first working prototype was a 9 foot parabolic bowl built in 1915 at Binbury Castle in Kent.
Between 1928 and 1930, a series of larger mirrors went up along the southern and eastern coasts of England. These included long curved walls and big dish shaped reflectors, some reaching 20 to 30 feet in diameter. The most famous group is at Denge near Dungeness in Kent, with a 200 foot curved wall mirror plus two large parabolic dishes. In good conditions, they could spot aircraft up to about 25 miles away, giving ground defenses 10 to 15 minutes of warning.
As planes got faster and engines quieter in the late 1930s, the mirrors could not keep up. At the same time, radar emerged as a far more accurate and longer range technology. By 1935, radar could track aircraft beyond the reach of the acoustic mirrors, and the mirror program was quietly ended by 1939. Even though they became obsolete before World War II, the acoustic mirrors were an important step in the history of early warning systems and many still stand today.
#archaeohistories
The Crochet Tim retweeted
If you want to see the most amazing photography from the ISS, Don is your guy.
The Crochet Tim retweeted
I finally have all 1.2 million raw image files from my latest mission to ISS! Here is a sample of one of my favorite Milky Way photos, taken from the Cupola with Nikon Z9, Arri Zeiss 15mm lens, T1.8 with custom sidereal drive that cancelled out star motion relative to our orbit.
The Crochet Tim retweeted
Matthew Hollingham has done it!
His Arctic to Africa challenge is over. He’s in Tangier after 3,500 miles starting with a swim across the Arctic Circle at the end of May.
Then 37 daily marathons, almost 2,500 miles cycling and - on the final day - an unplanned additional marathon after non-stop flat tyres.
Thank you to everyone who has supported him. Link below still live.
The Crochet Tim retweeted
In a corner of parliament at the far end of the Royal gallery a box lies permantly open containing sand from all five Normandy beaches -a reminder to both houses of the sacrifice & the cause of freedom fought for by brave service people on DDay June 6 th 1944. #DDay
The Crochet Tim retweeted
Extremely rare 'White Auroras' spotted over Norway.
The sky over Norway just did something it almost never does.
Photographers chasing the northern lights got the shock of their lives.
Instead of the usual greens and purples dancing overhead, the auroras turned ghostly white.
Pure. Pale. Almost glowing.
It's one of the rarest aurora displays on Earth.
Scientists say white auroras happen when multiple aurora colors overload the human eye at once, blending together until they appear colorless. The brain simply can't process all the wavelengths firing at the same time, so it surrenders and sees white.
Most aurora chasers go their entire careers without witnessing it.
Norway just delivered the impossible.
Cameras across the Arctic captured the eerie phenomenon lighting up the night like frozen lightning, leaving even seasoned skywatchers speechless.
Some called it otherworldly.
Others said it looked like the sky was bleeding light.
And for a few unforgettable minutes, the heavens above Norway turned into something nobody had ever seen before.
Readers added context they thought people might want to know
White Auroras like these are a hoax. None are real. All are CGI or AI.
explorenorthblog.com/the-white-auro…
facebook.com/vincentledvina…
The Crochet Tim retweeted
sorry it blew up, but for explosion fanatics, this is an all-time explosion caught on camera xitter.cf/SawyerMerritt/status/2…
The Crochet Tim retweeted
If you are under 25, this is a wonderful opportunity to join the oldest society dedicated to promoting all things "space" - the history of space exploration, current missions and milestones, and the cultural impact of the human desire to reach beyond the confines of the Earth.
The Crochet Tim retweeted
AIMED, as in ‘Artificial Intelligence & Mathematics Education’, is our new creative hub that captures all the #research activities and projects of Cambridge #Mathematics in the field. #ai
Find out more
👉 bit.ly/4fpooGN
The Crochet Tim retweeted
Today marks 30 years since the 1996 Monaco GP, and there is only one way to describe this race: Absolute Chaos
The winner was Olivier Panis starting from P14, in a race in which only 3 cars finished
The Crochet Tim retweeted
Celebrating the day Helen Sharman made history. 🚀 Britain’s first astronaut, first woman to visit Mir, and a trailblazer who showed an entire generation what’s possible when ambition meets opportunity. Her 1991 mission still inspires explorers across the UK and beyond. 🚀🇬🇧
"The English Cosmonaut": Celebrating Helen Sharman’s record breaking spaceflight and the Soyuz TM-12 mission which launched from the Baikonur Cosmodrome on 18 May 1991. Helen spent eight days in space, six of them onboard the Mir Space Station:
markdestewart.wixsite.com/th…
#OTD
The Crochet Tim retweeted
A Norwegian neuroscientist spent 20 years proving that the act of writing by hand changes the human brain in ways typing physically cannot, and almost nobody outside her field has read the paper.
Her name is Audrey van der Meer.
She runs a brain research lab in Trondheim, and the paper that closed the argument was published in 2024 in a journal called Frontiers in Psychology. The finding is brutal enough that it should have changed every classroom on Earth.
The experiment was simple. She recruited 36 university students and put each one in a cap with 256 sensors pressed against their scalp to record brain activity. Words flashed on a screen one at a time.
Sometimes the students wrote the word by hand on a touchscreen using a digital pen, and sometimes they typed the same word on a keyboard. Every neural response was recorded for the full five seconds the word stayed on screen.
Then her team looked at the part of the data most researchers had ignored for years, which is how different parts of the brain were communicating with each other during the task.
When the students wrote by hand, the brain lit up everywhere at once.
The regions responsible for memory, sensory integration, and the encoding of new information were all firing together in a coordinated pattern that spread across the entire cortex. The whole network was awake and connected.
When the same students typed the same word, that pattern collapsed almost completely.
Most of the brain went quiet, and the connections between regions that had been alive seconds earlier were nowhere to be found on the EEG.
Same word, same brain, same person, and two completely different neurological events.
The reason turned out to be something nobody had really paid attention to before her work. Writing by hand is not one motion but a sequence of thousands of tiny micro-movements coordinated with your eyes in real time, where each letter is a different shape that requires the brain to solve a slightly different spatial problem.
Your fingers, wrist, vision, and the parts of your brain that track position in space are all working together to produce one letter, then the next, then the next.
Typing throws all of that away. Every key on a keyboard requires the exact same finger motion regardless of which letter you are pressing, which means the brain has almost nothing to integrate and almost no problem to solve.
Van der Meer said it plainly in her interviews.
Pressing the same key with the same finger over and over does not stimulate the brain in any meaningful way, and she pointed out something that should scare every parent who handed their kid an iPad.
Children who learn to read and write on tablets often cannot tell letters like b and d apart, because they have never physically felt with their bodies what it takes to actually produce those letters on a page.
A decade before her, two researchers at Princeton ran the same fight using a completely different method and ended up at the same answer. Pam Mueller and Daniel Oppenheimer tested 327 students across three experiments, where half took notes on laptops with the internet disabled and half took notes by hand, before testing everyone on what they actually understood from the lectures they had watched.
The handwriting group won by a wide margin on every question that required real understanding rather than surface recall.
The reason was hiding in the transcripts of what the two groups had actually written down.
The laptop students typed almost word for word, capturing more total content but processing almost none of it as they went, while the handwriting students physically could not write fast enough to transcribe a lecture in real time, which forced them to listen carefully, decide what actually mattered, and put it in their own words on the page.
That single act of choosing what to keep was the learning itself, and the keyboard had quietly skipped the choosing and skipped the learning along with it.
Two studies. Two countries. Same answer.
Handwriting makes the brain work. Typing lets it coast.
Every note you have ever typed instead of written went into your brain through a thinner pipe. Every meeting, every book highlight, every idea you captured on your phone instead of on paper was processed at half depth.
You did not forget those things because your memory is bad. You forgot them because typing never woke the part of the brain that would have made them stick.
The fix is the thing your grandmother already knew.
Pick up a pen. Write the thing down. The slower road is the faster one.
The Crochet Tim retweeted
Science communicator Hank Green launched a specialized website that organizes every publicly released photo from the #ArtemisII mission into an interactive, live timeline. Located at artemistimeline(dot)com, the site syncs each image with the crew's official mission schedule and the real-time position of the Orion spacecraft during its 10 day journey around the Moon. By utilizing EXIF metadata from NASA's Flickr archives and trajectory data from public APIs, the platform allows users to see exactly where the crew was when a specific photograph was captured. Green utilized AI tools to assist with the massive data correlation required to align thousands of images with the spacecraft's orbital path.
Source: artemistimeline.com
The Crochet Tim retweeted
Did you know that the Milky Way is even milkier when viewed from the Southern Hemisphere? This is because from the southern side of our planet, we get a clearer, more direct view of the dense galactic core.
Here’s a look at the Milky Way starting over the Southern Ocean (between Australia and Antarctica) from our @SpaceX Dragon window, complete with some aurora (Southern Lights) and fleeting Starlink satellites. Enjoy the view!








































