Time again for another compilation of old School Dungeons & Dragons posts from twitter! I am still not tired of exploring the history and mechanics of classic RPGs and the adventures written for them.
Bughunters (1993), by Lester Smith. We begin with a look at a non-D&D roleplaying game produced by TSR in the early 90s, whose core conceit is pretty much given away in the title!
Time for another round of Fake Book Titles that I’ve done, compiled from twitter! You can see compilation 1 and compilation 2 at the links. These have proven to be a welcome distraction in stressful times. And, wow, I’ve done a lot since part 2!
As always with these, content warning for language, innuendo, and politics!
Original title: The Caves of Mars.
Okay, even though my book is now out in the world and I spent years working on it, I still manage to come across new things that surprise me about the problem of the falling cat! A good example of this came across my twitter feed the other day: a video of a cat doing some pretty incredible acrobatics. I include a gif of the relevant action, which includes a slower-motion version of the flip, below.
The cat, and the people, are startled by the sound of a passing car. The cat almost instantly does a complicated maneuver that results in it turning to cat the possible threat.
What surprised me about this: assuming that this video has not been altered, and I have no reason to think that it has, we have a cat that is using the cat-righting reflex to do something quite distinct from making sure it lands on its feet! In particular, it is using the “cat flip” to change its horizontal orientation, rather than its vertical orientation.
Being that I am now evidently the world cat flip expert by default, I thought I would take a closer look at this video to see if I can analyze the motion being done.
If you’re still not tired of Falling Felines and Fundamental Physics news, yesterday was a good day for new posts, which I thought I’d compile here, along with some earlier stuff I forgot to share!
The Curiosity Daily Podcast interviewed me late last year, and that interview went up yesterday! You can listen to the podcast here.
I wrote a blog post for BBC Science Focus giving an introduction to the science and history of falling felines, a bit of a “Cliff Notes” for the book, and it also appeared yesterday. You can read it here!
I somehow neglected to share this cool interview that my friend Jennifer Ouellette did with me about the book that appeared on Christmas Day, which you can read here!
It’s a small thing, but my longtime friend and colleague Scott Carney, when he announced the end of my term as an editor for the Journal of the Optical Society of America A, gave my book a shoutout!
I also did an early morning interview on Sirius XM’s Doctor Radio show about the book, but I don’t know if it is saved online — will investigate further…
Finally, I should mention that I will be doing my first “official” book event on Thursday, January 16th, at Park Road Books in Charlotte! I’m planning to read a bit from the book, sign copies, and try and demonstrate cat-turning techniques using an ice-skating spinner, so it should be an entertaining time if you’re in Charlotte or Charlotte-adjacent! The event starts at 7:00 pm.
I had to take a screencap for myself!
In case you’re not tired yet of hearing about my book on Falling Felines and Fundamental Physics, I wrote a post for BBC Science Focus Magazine about the falling cat phenomenon, which you can read here. A sample of the article:
With the recognition of conservation of energy, physicists soon decided that a cat simply cannot flip over on its own in freefall once it begins falling. The consensus view was that a cat, at the moment it begins to fall, must push off of its perch to give itself some initial rotation that leads to it ending on its feet. The cat generates its angular momentum by imparting the opposite angular momentum to its perch and, consequently, the Earth itself.
But this explanation was demolished in a fateful meeting of the French Academy of Sciences on October 22, 1894, by the physiologist Etienne-Jules Marey. Marey presented a sequence of high-speed photographs taken of a falling cat, the first of their kind, showing clearly that the cat begins falling upside-down without any rotation but nevertheless manages to turn over to land on its feet.
The revelations of the photographs threw the meeting into disarray. One member of the Academy declared that Marey “had presented them with a scientific paradox in direct contradiction with the most elementary mechanical principles.”
I’ll be back with more posts soon!
I’ve picked up a significant number of new followers on the blog lately, and this combined with the wrap-up of the decade seems like a good time to share some of my favorite history of science posts of the past ten years, for those who might have missed them. I can’t say that I’ve written at a particularly fast pace, but I do manage to find some of the strangest, most obscure, and most interesting tales about science and how it has been done! What follows is a list of posts, by year, and a short description of what makes them special to me.
Here’s hoping for another ten years of fascinating science and science history!
April 28, 2010: Mythbustin’: 1808 edition (the incombustible man). Science has a long history of debunking supposed supernatural powers, and a great and relatively little-known example of this was early efforts to explain how some performers seemed to be immune to heat and fire! A fun post that delves into both science and theatrics.
Back from China and hoping to get some more blogging done! After some 24 hours of non-stop travel, I got back on the 23rd and decided to stay awake as long as possible by going to see the final movie in the Star Wars Skywalker epic, The Rise of Skywalker. Like the previous two episodes in this trilogy, I thought I would share some spoiler-laden thoughts on the movie here safely below the fold in a blog post where they can’t hurt anyone!
A word of warning, and a disclaimer, before I begin, though. My reaction to the movie was… not great. But everyone is entitled to their own opinion, and if you liked the movie, this is not a judgment or criticism of you. I’m not writing this to argue, but rather to just clear my head of the thoughts that have been spinning around since I saw the movie. Also, I really wanted to round out the posts I did about the first two movies, here and here.
And I’m not interested in arguing, either, so any hostile comments will probably be deleted and the posters blocked! Star Wars fandom has become rather toxic in recent years, and I don’t feel like indulging in that toxicity.
The author of Skulls in the Stars is a professor of physics, specializing in optical science, at UNC Charlotte. The blog covers topics in physics and optics, the history of science, classic pulp fantasy and horror fiction, and the surprising intersections between these areas.
