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Robert McNees Profile picture
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3 Jan, 5 tweets, 2 min read
It’s the second day of the new year and I’m settling in with an Old Fashioned and my dog to watch this documentary about the origins of Dungeons & Dragons.
secretsofblackmoor.com
Absolutely love these mid 1970s - early 1980s nerds. Inject this stuff right into my veins.
The folks who made the film are on here as @Blackmoor_Film. Fascinating so far.
I had never heard of “Strategos” before watching this film.
en.m.wikipedia.org/wiki/Strategos…
Oh I really enjoyed that. I have questions about technical aspects of Blackmoor that made their way into D&D (I heard references to “hit points”). But just a really interesting watch for fans of rpgs.

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More from @mcnees

Robert McNees Profile picture
4 Jan
Physicist and mathematician Isaac Newton was born #OTD in 1643. He revolutionized our understanding of mathematics, mechanics, gravity, and optics, then foiled counterfeiters as warden of the Royal Mint.
Portrait: Barrington Bramley, after Godfrey Kneller Image
Newton's "Philosophiæ Naturalis Principia Mathematica” was published in 1687. It lays out his three Laws of Motion, which explain the relationship between the forces and changes in an object’s motion, and his universal law of gravitation. The cover page of the first...
You can page through Newton's own annotated copy of his Principia here, courtesy of the Cambridge University Library. (You can also download copies of individual pages.)
cudl.lib.cam.ac.uk/view/PR-ADV-B-… Image
Read 12 tweets
Robert McNees Profile picture
1 Jan
Ninety seven years ago, #OTD in 1925, Edwin Hubble announced that our Milky Way was just one of many lonely little islands of stars sprinkled throughout the Universe. Andromeda and all the other “spiral nebulae” were in fact separate galaxies, outside the Milky Way.
Hubble’s announcement — other galaxies exist! — was made on the third day of the 33rd Meeting of the American Astronomical Society, in a paper read by H.N. Russell. The meeting started on December 30th; I don’t know if Hubble waited for New Year’s Day to be dramatic.
Hubble’s work, conducted with the 100-inch Hooker Telescope at Mount Wilson observatory, relied on earlier measurements by Vesto Slipher and Henrietta Swan Leavitt’s results on Cepheid variable stars.
Image: Huntington Library
Read 13 tweets
Robert McNees Profile picture
31 Dec 21
So my mom, the world’s fastest knitter, just sent me a great and much-needed hat! And it comes with a neat story. Image
The yarn is “Kumlien’s Gull” by @quinceandco. Image
Kumlien’s Gull is a sub-species of the Iceland Gull. I’m not a bird person, but I understand there’s some controversy. Anyway, it’s named after Ludwig Kumlien.
Read 5 tweets
Robert McNees Profile picture
31 Dec 21
Some threads I did this year that I liked:
Vera Rubin
Emmy Noether
Read 13 tweets
Robert McNees Profile picture
30 Dec 21
Yvonne Madelaine Brill was born #OTD in 1924. She was a rocket scientist who invented the hydrazine resistojet, which increased the payload capacity of satellites by reducing the weight of propellant they require. JWST (@NASAWebb) uses hydrazine thrusters!
Photo: W. McNamee/Getty Image
Here is the JWST propulsion page describing its SCAT and MRE-1 thrusters which use hydrazine as a fuel and propellant, respectively.
jwst-docs.stsci.edu/jwst-observato…
Yvonne Madelaine Brill studied Chemistry and Math at the University of Manitoba. She wanted to study engineering, but women weren't allowed at the time.
Read 13 tweets
Robert McNees Profile picture
22 Dec 21
Read 19 tweets

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