From Brahmagupta to Viète: The thousand year journey of the decimal place-value number system and algebra into formal, European mathematics #histsci
thonyc.wordpress.com/2026/09/24/t...

From Brahmagupta to Viète: The thousand year journey of the decimal place-value number system and algebra into formal, European mathematics #histsci
thonyc.wordpress.com/2026/09/24/t...
September 23, 1832, Darwin recovered his first fossil at Punta Alta (Buenos Aires, Argentina). He collected a considerable number of fossil mammals from South America. Those discoveries sparked the theory of #evolution
wp.me/p3ihHu-ji #histsci 🧪⚒️
The @rigb.org's Huxley portrait is **considerably** heavier than it looks.
Fortunately, the rest of the evening belonged to @sadiahqureshi.bsky.social, a menagerie of extinct soft toys, and a fascinating exploration of extinction & de-extinction.
He slept on soot, wore a blanket pinned with a meat skewer, left a thousand pounds uncashed rather than touch the Queen's stamps. Then he opened a window-grille to dukes, tramps, and Dickens. Meet James Lucas, Hertfordshire's receiving hermit.
preparing my class on artisanship, science, modern society, environment and oeconomy as I start with the basics... #EnvironmentalHistory #descartes this text seems appropriate to fulfil my reasoning! #17thcentury #envhist #histsci
Day 23 #SciArtSeptember prompt is copper so I am sharing my #linocut of the first woman to earn a doctorate in science, physicist and professor Laura Maria Caterina Bassi Veratti (née, & known throughout her life as Bassi, 1711-1778). 👩🏼🔬🧪🐡🎢 #histsci
I’ve shown her surrounded by the sort of
23-Sep: On this day in 1832, young Charles Darwin made an important discovery at Punta Alta in Argentina: the fossil remains of what he took to be a species of rhinoceros. It was actually an extinct species of giant ground sloth, or Megatherium…
friendsofdarwin.com/articles/dar...
#HistSci
For those that observe, may you and yours be blessed w/ abundance & balance this #equinox
Sept 23 0005 UT (Sept 22 2005 EDT)
#Sun crossed #celestialequator southward
UMass Amherst Sunwheel vividly teaches these #season cycles
#astrophysics #autumnalequinox #calendar #fall #histsci 🧪🏛️🍎☀️ #scicomm
He failed out of two religious orders and passed his ordination exam by luck. Then he started levitating — triggered by music, stray remarks, the mention of heaven. The Church's solution: ban him from everything.
via Siska De Baerdemaeker:
2 #HPS #philjobs in Philosophy Dept @ Stockholm Uni:
1. #PhilSci w/ a focus on social epistemology, values & science:
su.varbi.com/en/what:job/...
2. #HistSci or #DigitalHumanities:
su.varbi.com/en/what:job/...
Deadline: November 8, 2026.
In 1626 she published a 900 page genealogy of Danish nobility. She remained famous for garden till her death in her 80s.
Happy birthday to Sophie Brahe (born either Aug 24, 1559 or Sept 22, 1556 -1643) 👩🏼🔬🧪🔭 #histsci horticulturalist, astronomer, genealogist, & alchemist with the gardens at her brother #astronomer Tycho Brahe’s Uraniborg estate, where she often assisted his research, alchemical tools & illustrations 🧵
To those who observe, may you have a good final sealing.
#RoshHashanah is #newmoon, #newyear
#YomKippur occurs 10 days later w/ #Moon waxing but not yet full
Jewish #calendar synchronizes #moonphases & #seasons ( #lunar & #solar cycles).
I don't watch a lot of TV news, but I sure hope the news channels are making hay out of "Secretary Bessent asserts (smugly) that Robert Oppenheimer was NOT a physicist."
Perhaps interviewing a Historian of Science.
Or, better, a Sixth Grader Who Has Learned How To Use An Encyclopedia.
Delighted to share that I'll be on @askhistorians.bsky.social to talk #ArtificialLight #LightPollution #Night #Darkness 🌌💡🌃🛰️ tomorrow, 9/22 -- the day that #TransformingNight drops! 🥳🤩
#envhist #envhum #histtech #histsci #sts #histSTM
My book review of a nice volume on #plantphilosophy #plantcognition #planthumanities - the volume is edited by Ferretti, Schulte and Wild, Philosophy of Plant Cognition #plantstudies #histsci
She slept in a rosewood coffin, took mail through a hinged skull named Sophie, and shot a boa constrictor in her drawing room. Sarah Bernhardt, the most famous actress alive, also kept an alligator. She fed him champagne.
elected to the Geological Society of America in 1924; & elected VP of the GSA in 1930. She was associate editor of the American Geologist, 1896-1905. In 1906 she was added to the list of 100 most influential geologists by Men in Science, selected by her peers. #printmaking #histsci #linocut
The next category for #sciArtSeptember is category, starting with kaolin, a mineral which appears in several papers of US geologist & prof Florence Bascom (1862-1945). 👩🏼🔬⚒️🧪 #histsci She championed women’s education, & used polarizing microscopes for detailed petrographic analysis to show that rocks