Education
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33 Line React
A programming essay showing how a React-like library can fit in 33 lines of code, as a way to understand how components…
52 Things I Learned in 2025
Kent Hendricks' yearly list of 52 surprising things he learned, from odd science findings to quirks of history and human…
A Beginner's Guide to Basic Urdu Grammar
An introductory guide to Urdu grammar rules for beginners, covering the basics of sentence structure and word forms to g…
A Beginner's Guide to Making Beautiful Slides
Ines Montani shares her practical tips and three beginner-friendly steps for designing clear, attractive talk slides, wi…
A Brief History of Lace
The Lace Guild traces lace from its 16th-century beginnings through bobbin and needle lace, the rise of machine lace and…
A Brief History of Spore
An essay on the long, winding design history of Will Wright's game Spore and the ideas that shaped it from early prototy…
A Brief Interview with AWK Creator Brian Kernighan
A short Q&A with Brian Kernighan about creating AWK, how small languages come to be, and what a lifetime of Unix-era pro…
A Calculator App? Anyone Could Make That
A fun deep dive into why a seemingly trivial calculator app hides surprising difficulty, from floating-point oddities to…
A Darkly Mysterious Instrument
A post from the Historical Photographs of China project following Victorian photographer John Thomson through China, and…
A Data Table Thousands of Years Old
A short, fascinating post about a Babylonian clay tablet that is effectively a data table, looking at how ancient scribe…
A Few Rules For Predicting The Future
Octavia E. Butler's short essay on how she imagined the futures in her novels, with her rules for thinking about what co…
A Hepster's Dictionary
Princeton's Graphic Arts Collection shows off Cab Calloway's Hepster's Dictionary, the 1930s and 40s guide to jive talk…
A Kantian Critique of Sorry by Justin Bieber
A tongue-in-cheek philosophy essay that holds Justin Bieber's pop apology up against Kant's categorical imperative and a…
A leap year check in three instructions
A short, clever write-up showing how to test for leap years in the Gregorian calendar with just three machine instructio…
A Los Angeles Primer: Union Station
A history of Los Angeles Union Station, the 1939 rail terminal, covering its Mission Revival design, its Dean Cornwell m…
A Love Letter to Flashcards
A personal reflection on how hand-made flashcards and spaced repetition keep knowledge alive, with practical advice on w…
uniqueatpenn.wordpress.com
Article
A Rocket Cat?
A Penn special-collections post on the bizarre rocket cat and rocket bird illustrations in a 16th-century artillery manu…
A Short Introduction to Automotive Lidar
A clear guide to how lidar works in self-driving cars, covering time of flight, scanning methods, wavelengths and the tr…
A Spark Extinguished
A review of a book on Tombstone, the 1960 account of students exiled to the countryside during the Great Famine who dare…
A Symphony of Color: Mary Gartside on Light and Shade
A Winterthur blog post on Mary Gartside's 1805 Essay on Light and Shade, an early color theory book by a woman, with its…
thonyc.wordpress.com
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A Telescope Chronology
A history-of-science blogger lays out the real early timeline of the telescope, showing that Galileo neither invented it…
A Troll avant la Lettre
A Dublin Review of Books essay on Louis-Ferdinand Celine and how he tried to manage his post-war reputation as a collabo…
A truly incredible fact about the number 37
A playful number theory blog post explaining why 37 turns up as the median value of the second prime factor of an intege…
A Visual Proof That Neural Nets Can Compute Any Function
Michael Nielsen's chapter with interactive widgets that show step by step why neural networks can approximate any functi…
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