Tracy Craig
astrolabecat.bsky.social
Tracy Craig
@astrolabecat.bsky.social
Mathematics lecturer at a technical university in the Netherlands.
Researcher of Mathematics Education.
Lover of books, cats, pottery, maths, astronomy.
SCA medieval reenactor.
🇳🇱 🇬🇧 🇿🇦
Profile pic: my cat Willow, of blessed memory
Reposted by Tracy Craig
My first ever job was at a supermarket. I worked with an older gentlemen who must’ve been in his late 70s and while I can’t name the supermarket due to an ongoing legal dispute the guy must be dead by now so I’ll just use his real name: Barnaby.
December 22, 2025 at 7:08 AM
Reposted by Tracy Craig
A book from the 19th century that depicts the Rhine Valley by creating an impression of three-dimensionality and spatial distance.
@MasayukiTsuda2 #globalmuseum #books #travel #19thcentury
December 2, 2025 at 7:02 PM
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Today is the last day to order my #puzzles, so I'm sharing this monstrocity again 🤣

Yip yipp yippp!

Pillars of Googly Eyes available as 1000-piece puzzle 🧩

🔗 sciencesocks.co/pages/puzzle...

🔭🐡🧪🎨 #ArtAdventCalendar
December 4, 2025 at 12:33 AM
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Gracefully carving through the solar corona, a mini eruption of filament plasma erupted from the Sun earlier today! Beautiful.
December 4, 2025 at 12:35 AM
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in case you didn’t know, in a year voyager 1 will be 1 light-DAY away from earth.

it took almost 50 YEARS of travel time to reach that distance and will be the first human-made object to reach this distance.
November 28, 2025 at 11:32 PM
I have donated to this fundraiser to send a South African opera singer to Hochschule für Musik und Tanz Köln. He won a prestigious chance to attend, but cannot afford travel & accommodation. Please consider contributing.
whydonate.com/fundraising/...

#opera #southafrica #kimberley #cologne #music
Fundraiser by Simphiwe Mfazwe | Help me through Year One of a Musical Theatre Masters in Cologne
Simphiwe Mfazwe Needs Your Help | About this crowdfunder : My name is Simphiwe Mfazwe. I come from the Kimberley in the Northern Cape province in South Africa. I have been accepted for the Ma...
whydonate.com
October 14, 2025 at 5:17 AM
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🔒MARTHINUS VAN STADEN: The cancer killing SA universities. Parasitic industries drain resources, but something far more sinister is at work on campuses. www.businesslive.co.za/bd/opinion/2...
MARTHINUS VAN STADEN: The cancer killing SA universities
Parasitic industries drain resources, but something far more sinister is at work on campuses
www.businesslive.co.za
August 18, 2025 at 4:41 AM
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Capetonians march in solidarity with media workers targeted and killed in Gaza. “Every colonial project survives on two weapons: physical extermination of the colonised people and control of the narrative. The power to erase, distort and rewrite reality.” www.dailymaverick.co.za/article/2025...
Cape Town journalists march in solidarity with media workers killed in Gaza
A march in Sea Point, Cape Town, on Sunday was the latest in a series of protests aimed at spotlighting the targeted killing of media workers in Gaza. Local journalists led the demonstration, expressi...
www.dailymaverick.co.za
August 18, 2025 at 4:55 AM
Reposted by Tracy Craig
Beyond excited that my study of the medieval 'Dane saga' of Breda is finally out (OA 🔓) alongside a first English translation! This anachronistic oddity of devotional/literary storytelling posits how a group of 'vikings' arrived and troubled the city for years.

www.brepolsonline.net/doi/epdf/10....
The Dane saga of Breda: A Late Medieval Account of Viking Endeavour and Vernacular Devotion: The Medieval Low Countries: Vol 11
Found in the municipal archives of Breda (present-day North Brabant, Netherlands) is a conspicuous but ill-studied late fifteenth or early sixteenth-century codex, whose contents are deemed to have been composed within the late medieval town. Although characterised as a local cross legend, the Middle Dutch work is customarily referred to by its modern moniker of Denensage (i.e. Dane saga) due to the presence and pursuits of ‘viking’ mariners over the course of its verse narrative. By imparting how a group of Danes found their way to Breda and established a stronghold there – refashioning a prominent local tree into a cross in the process – the work occupies a distinct confluence of historiographical, devotional, and literary authorship. Situating the Dane saga in its sociocultural context, this article explores the wide-ranging narrative influences underpinning it, whilst determining its potential authorship and intended audience(s). Lastly, as well as furnishing a new edition of the manuscript, it offers the first English translation of this important, idiosyncratic text.
www.brepolsonline.net
August 7, 2025 at 1:56 PM
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With Tom Lehrer's passing, I suppose this is a moment to share the story of the prank he played on the National Security Agency, and how it went undiscovered for nearly 60 years.
July 27, 2025 at 9:01 PM
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The secret German weather station on the Arctic island of Svalbard. Part of the 'Weather War'.

The team, led by Lieutenant Wilhelm Dege, were the last German troops to surrender in WW2, finally doing so FOUR MONTHS after Germany had officially surrendered.

It was not for want of trying. /1
June 28, 2025 at 6:51 AM
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Delftware tiles!

There were hundreds of fabulous examples to choose from in the Victoria & Albert Museum’s online catalogue, but I eventually settled on nine.

These 18th-century ships, shepherds, castles, figures, and flowers brought me joy. I hope they’ll do the same for you, too.
May 29, 2025 at 7:11 AM
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#TudorTuesday
Man’s Cloak
1580-1590
Spain
Italian velvet

Silk velvet with applied border of silk satin, couched with silk cord

www.instagram.com/p/DKI9M7pNpn...

#Cloak #MansCloak #GentlemansCloak #SilkVelvet #Velvet #Clothing #ItalianVelvet #Spain #History
May 27, 2025 at 4:17 AM
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Trump Makes False Genocide Claims. South Africans Respond With Humor. www.nytimes.com/2025/05/22/w...
Trump Makes False Genocide Claims. South Africans Respond With Humor.
www.nytimes.com
May 23, 2025 at 5:27 AM
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Life sucks. Laugh at these baby names instead
www.buzzfeed.com/kristatorres...
55 Unhinged Baby Names Parents Actually Picked
"Twins in the NICU, one boy, one girl named Brock Lee and Callie Flower."
www.buzzfeed.com
May 22, 2025 at 2:31 AM
I feel crowded by people and communities insisting, with varying levels of urgency, that I employ "AI for education" in my classrooms and that I use it as a context for my maths education research. It is presented as an opportunity, a valuable tool, an unproblematic Good.
(1/8)
May 21, 2025 at 2:44 PM
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It’s Mary Anning’s birthday, so time to share @katebeaton.bsky.social’s brilliant cartoon again.
May 21, 2025 at 11:31 AM
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Open this photo up and look for the small, white dot just left of centre.

It looks like Venus, shining brightly in the twilight sky.

But it's us.

It's Earth.

From Mars.
November 24, 2024 at 3:19 AM
Gorgeous!
The Many Faces of Mary Tudor (Queen of France) tonyriches.blogspot.com/2023/07/the-... #Tudors
May 10, 2025 at 5:30 AM
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#OnThisDay, 9 May 1922, the International Astronomical Union formally adopts Annie Jump Cannon's stellar classification system. The principles in it still underpin modern classification.

#WomenInHistory #OTD #History #WomensHistory #Astronomy #WomenInSTEM #AmericanHistory 🗃️
May 9, 2025 at 8:30 AM
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Oh, this?

Just sunlight reflecting off a lake.

A lake of liquid methane.

On an icy world 1.4 billion kilometres away.
November 24, 2024 at 11:08 PM
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Paul van Hoeydonck, who created the first artwork on the Moon, died on Saturday.

A few years ago @lauriestories.bsky.social and I investigated the strange, twisted story that took the "Fallen Astronaut" sculpture to the Moon & sparked a scandal. Linked here: 🧪🔭

www.slate.com/articles/hea...
May 6, 2025 at 7:12 PM
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Their Royal Majesties, Æríkr inn hárfagri II and Jacquelyna de Bellmont II, have made known Their intent to make Mestari Kerttu Katariinantytär Roisko the Premier of the Order of the Mark in Drachenwald, at Midsummer Coronation in Ad Flumen Caerulum.

Book here! sites.google.com/drachenwald....
Midsummer Coronation - Booking and prices
sites.google.com
May 1, 2025 at 10:52 PM
A colleague and I have just submitted a paper to my favourite journal, IJMEST @mathedscitech.bsky.social . I am so proud of the work we did and am really holding thumbs the paper gets accepted.
April 29, 2025 at 1:14 PM
Reposted by Tracy Craig
Giant prehistoric kangaroos preferred to ‘chill at home’ and didn’t like to go out much, scientists say
Giant prehistoric kangaroos preferred to ‘chill at home’ and didn’t like to go out much, scientists say
Fossil teeth show species of protemnodon that roamed Australia between 5m and 40,000 years ago lived and died near Queensland caves
www.theguardian.com
April 23, 2025 at 7:15 PM