Philipp Otto Runge’s Farbenkugel (1810). The top two images show the surface of the sphere, while the bottom two show horizontal and vertical cross sections. From our selection of colour charts, wheels and tables through the centuries: publicdomainreview.org/collection/c...

After 80 Years, Mathematicians Give Famed ‘Erdős Method’ an Upgrade by Leila Sloman www.quantamagazine.org/after-80-yea... Books about Mathematicians at PG: www.gutenberg.org/ebooks/subje... #books #mathematics

Celebrating 250 Years of the USA To honor the 250th anniversary of the United States of America, The History Reader has put together a list of top Revolutionary War-era books published over the last two decades. www.thehistoryreader.com/us-history/c... #books #literature #USHistory

Reading Homer’s Iliad feels like scrolling through TikTok The Iliad does not unfold as a smooth, continuous narrative. Instead, it advances through a succession of micro-episodes by Harsh Trivedi theconversation.com/reading-home... The Iliad @ PG www.gutenberg.org/ebooks/6130 #books #literature

Why We Still Love Mr. Darcy, 200 Years Later Susan Moore in Praise of the Model For Self-Aware Romantic Heroes lithub.com/why-we-still... Pride and Prejudice at PG: www.gutenberg.org/ebooks/1342 #books #literature

Why did this journal retract two 1940s papers by Max Planck? by Jennifer Ouellette arstechnica.com/science/2026... Books by Max Planck at PG: www.gutenberg.org/ebooks/autho... #books #science #physics

#OTD in 1966, Betty Friedan wrote "NOW" on a napkin. Catherine Conroy put $5 on the table and said “put your money down & sign your name” to the 15 women in the room & the National Organization for Women was born. Today, NOW is the largest org of #womensrights activists in the US. #WomensHistory

Developmental psychologist Margaret Byrd Rawson is affectionately dubbed the "Grand Dame of Dyslexia." She spent decades conducting foundational research to identify, study & effectively treat reading disorders, serving as a pillar of modern #dyslexia education. Born #OTD 1899. #WomenInSTEM (1/2)

“John Bull is ignorant of the States; he is probably ignorant of India; but, considering his opportunities, he is far more ignorant of countries nearer his own door…” —Robert Louis Stevenson, “The Foreigner at Home” in MEMORIES & PORTRAITS via @gutenberg.org #C19 www.gutenberg.org/files/30598/...

This month's blog from Distributed Proofreaders (DP) travels "Through the Grand Canyon." blog.pgdp.net/2026/07/01/t... #dp #dpBlog

Deuterium in Comets Tells Interesting Tales By Carolyn Collins Petersen www.universetoday.com/articles/deu... Books about Comets at PG: www.gutenberg.org/ebooks/subje... #books #science #astrophysics

Guide to the classics: John Steinbeck’s East of Eden has always been controversial by Paul Giles theconversation.com/guide-to-the... Books in American Literature at PG: www.gutenberg.org/ebooks/books... #books #literature

Maryly Van Leer Peck US academic, 1 of 1st women graduates of School of Engineering @ Vanderbilt Uni 1st woman with degree in chemical eng there. 1st woman to earn MS & PhD in engineering from University of Florida. Memb of Soc of Women Engineers. b. #OTD 29 Jun 1930 en.wikipedia.org/wiki/Maryly_...

🇺🇸 As America marks its 250th anniversary, the Internet Archive is preserving & providing free access to materials documenting the nation’s founding and 250 years of Independence celebrations. Get an advance look at what’s coming here! ⤵️ 🔗 blog.archive.org/2026/06/29/t... #AmericanHistory

Here’s What Life Was Like in 1776 vs. Today www.rd.com/article/life... #history #USHistory

Browse 5.8 million works of art at the Last Museum by Rob Beschizza boingboing.net/2026/06/29/b... Last Museum: lastmuseum.com Books in Art at PG: www.gutenberg.org/ebooks/books... #books #literature #art #culture

How a Childhood Bookmobile Sparked My Love of Reading Brenda C. Wilson Remembers the Start of Her Reading Journey lithub.com/how-a-childh... Books in Banned Books List from the American Library Association at PG: www.gutenberg.org/ebooks/books... #books #literature #publicLibrary

@jennmjacksonphd.bsky.social Ida B. Wells: Trailblazing Journalist, Anti-Lynching Crusader, and Architect of American Civil Rights wncri.org/2025/12/13/i...

Elizabeth Barrett Browning, one of the Victorian era's most celebrated English poets, was renowned for her lyrical, passionate & intellectually rich work. She expanded what women could write about and how seriously they were taken. She died #OTD in 1861. #poetry #litsky #poetrysky

How Jack Kerouac’s “On the Road” Inspired the Beat Movement With the 1957 publication of Kerouac’s On the Road, critics believed America’s “lost” literary generation of the 1920s had been overtaken by the Beat Movement. www.thecollector.com/jack-kerouac... #books #literature

John Singer Sargent Painting Reveals Hidden Image During Conservation by Vittoria Benzine news.artnet.com/art-world/me... Books illustrated by John Singer Sargent at PG: www.gutenberg.org/ebooks/autho... #books #art #culture

I have spent the past 6 months reading hundreds of poems by young people – I was surprised to find hope, not despair by Sean Murphy theconversation.com/i-have-spent... Books in Poetry (including The Blue Poetry Book by Andrew Lang) at PG: www.gutenberg.org/ebooks/books... #books #literature

First page of "Dialogue of Frederic Ruysch and his Mummies", a short skit by the great Italian writer Giacomo Leopardi, who died today in 1837 (aged just 38). Leopardi's subject here is a real life physician renowned for his macabre anatomical displays: https://buff.ly/2Tu5t7w

"Alone we can do so little; together we can do so much." Helen Keller (b. #OTD in 1880): first deaf-blind person to earn a Bachelor of Arts, she published 14 books & used her global platform to fight for women’s suffrage, labor rights & civil liberties--co-founding the ACLU in 1920. #HelenKellerDay

At a Pivotal Moment of the Civil War, Frederick Douglass Delivered a Speech That Reframed What Was at Stake if Slavery Stood www.smithsonianmag.com/history/pivo... #history #USHistory

Ethel Moustacchi (1933-2016) Ethel Moustacchi is one of the 72 women whose names will be inscribed on the Eiffel Tower in 2027, alongside the 72 male scientists that Eiffel had chosen in 1889. musee.curie.fr/blog/ethel-m... About Ethel Noustachi: en.wikipedia.org/wiki/Ethel_M... #WomenInStem

Obstinate Daughters: shining a light on the women who sparked the American Revolution by Martin Pengelly www.theguardian.com/books/2026/j... Books about Women in the American Revolution at PG: www.gutenberg.org/ebooks/searc... #books #literature #history

Why Did the Chicken Cross the Road? The History Behind the World's Most Famous Joke The world's best-known joke has roots in 19th-century humor—and may have pioneered a form of comedy now known as anti-humor. www.mentalfloss.com/history/why-... #humor #history

Sophie Germain taught self maths Latin Greek 2 read scientific works. Used male name to work w mathematicians. 1815 1st woman w Academy of Sciences prize 4 thesis on elastic surfaces. Researched material strength later used in building Eiffel Tower d #OTD 27 Jun 1831 en.wikipedia.org/wiki/Sophie_...

We read an entire scroll — without ever opening it PHerc. 1667, sealed since the eruption of Vesuvius in 79 AD, has been virtually unwrapped and read from beginning to end scrollprize.org/firstscroll The Herculaneum Papyrus Scrolls project www2.cs.uky.edu/dri/herculan... #books #old_Manuscripts

The divine Dante At 700, Dante’s Divine Comedy is as modern as ever – a lesson in spiritual intelligence that makes us better at being alive by Mark Vernon aeon.co/essays/the-f... The divine comedy at PG: www.gutenberg.org/ebooks/8800 #books #literature #metaphysics #spirituality

Be aware that a malicious website is using guttenberg (two “T” not one) to distribute malware. We haven’t been able to neutralize them yet, still working on it.

Theodore Roosevelt Survived an Assassination Attempt Because a Speech Tucked Inside His Pocket Slowed the Bullet. He Insisted on Delivering His Remarks Anyway www.smithsonianmag.com/history/theo... #history #USHistory

Planet orbits so close to its star that their magnetic fields connect At the right point of the orbit and stellar cycle, the star’s chromosphere brightens. by John Timmer arstechnica.com/science/2026... Books about Cosmology at PG: www.gutenberg.org/ebooks/subje... #books #science #cosmology

A Necessary History of the Oddest Letter: W Danny Bate on the Linguistic History of Our Alphabet lithub.com/a-necessary-... Books about Linguistics at PG: www.gutenberg.org/ebooks/searc... #books #literature #linguistics

Project Gutenberg is attending #ALAAC26! Enjoy it @gluejar.com www.gutenberg.org #ebooks #publicdomain

📣 Librarians! Attending #ALAAC26 this weekend? 📚 Stop by Booth 2130 with our literacy partner, Better Worlds Books 📖, to talk to us and snag a sweet Wayback Machine sticker! See you there!

Doctorate in Philosophy Awarded to a Woman for the First Time (1678) Born to a noble Venetian family, Elena Cornaro Piscopia became the first woman to be awarded a doctorate in philosophy. encyclopedia.thefreedictionary.com/Elena+Cornar... #OTD #history

Every American Knows the Declaration of Independence. Almost Nobody Knows the Woman Who Printed It by Meredith Herndon www.smithsonianmag.com/blogs/smiths... The Declaration of Independence is our 1st ebook produced by Michael Hart and published by PG: www.gutenberg.org/ebooks/1 #ebook #history

How reading shapes and enhances our cognitive activity by Stephanie Baum, reviewed by Robert Egan phys.org/news/2026-06... Books about Comparative linguistics at PG: www.gutenberg.org/ebooks/subje... #books #cognition #language #psyco_linguistics

Maria Sibylla Merian (1647–1717) was a pioneering naturalist, entomologist & scientific illustrator whose meticulous artwork & observations: 🦋 Revolutionized the study of insects 🐜 Laid early groundwork for #ecology 🐞 Permanently changed how we understand insect life It's #InsectWeek #WomenInSTEM

Happy (?) birthday Ambrose Bierce! The American journalist, born #onthisday in 1842, is best known for his satirical dictionary The Cynic’s Word Book also known as The Devil’s Dictionary. Read it here: https://publicdomainreview.org/collection/the-cynic-s-word-book-1906 #otd

Libraries Not Doing Pride Displays Say They ‘Shouldn’t Be Judged’ Public records show dozens of libraries have self-censored to avoid attracting negative attention. by Claire Woodcock www.404media.co/libraries-no... #books #literature #lgbtq

“Suppose it ill paid: the wonder is it should be paid at all. Other men pay, & pay dearly, for pleasures less desirable” —Robert Louis Stevenson, “Letter to a young gentleman who proposes to embrace the career of art” via @gutenberg.org Happy #NationalWritingDay! www.gutenberg.org/cache/epub/6...

10 Must-Know Facts About Edward Hopper Here are 10 fascinating facts you need to know about the famous American painter Edward Hopper. www.thecollector.com/edward-hoppe... #art

The voyages of Ancient Pacific mariners echo in modern space exploration by Geoff Manaugh aeon.co/videos/the-v... Books about Outer space -- Exploration at PG: www.gutenberg.org/ebooks/subje... #science #technology #history #books

Standing down the International Catalog of Sources The AIP Niels Bohr Library & Archives is narrowing its catalog scope from a global index of physics history sources to just its own holdings. by Chip Calhoun www.aip.org/library/stan... #library #physics #science

When a Photographer Turned His Focus on Social Injustice, It Helped Usher in the First Child Labor Laws www.smithsonianmag.com/history/when... "West Side Studies: Boyhood and Lawlessness; The Neglected Girl" at PG contains some of Hine's photographs www.gutenberg.org/ebooks/60116 #history

#OTD in 1819. Washington Irving’s “Rip Van Winkle” is Published By one "Geoffrey Crayon" lithub.com/this-week-in... Rip Van Winkle by Washington Irving at PG: www.gutenberg.org/ebooks/60976 #books #literature

An appreciation: Roland Jackson’s Scientific Advice to the Nineteenth-Century British State by William Thomas www.aip.org/history/jack... Books about Science at PG: www.gutenberg.org/ebooks/subje... #Books #Science #Technology