I am absolutely thrilled to present to you:
How to Build a Universe (Theoretically Speaking)
available for pre-order now, wherever you buy your books!

@astrokatie.com
1.5k Following330.6k Followers
Cosmologist, pilot, author, connoisseur of cosmic catastrophes. TEDFellow, CIFAR Azrieli Global Scholar. Champion amateur horologist. She/her. Dr. Personal account; not speaking for employer or anyone else.
I am absolutely thrilled to present to you:
How to Build a Universe (Theoretically Speaking)
available for pre-order now, wherever you buy your books!
He gave so much to so many, and always with such joy
ok
I would go drop by to see if X is suddenly friendly now but I can’t really risk checking my mentions over there, since last I heard the site’s official in-house chatbot pretty reliably gets used to fill women’s mentions with sex-abuse images just for existing.
I didn't know Steve personally but I got the impression he was a pillar of the community. I was close with Joe, the instructor he was with.
Anyway I and a lot of my friends, especially in the Ontario general aviation and aerobatics community, are having a tough time right now. Don't really want to get into it but we lost two wonderful people on Friday.
A wonderful thing about the general aviation community is that it is pretty small and tight-knit and you get to know a lot of people who are wonderful and open and generous and kind. But it is also a community with rather more sudden death than most and god it hits hard when the worst happens.
Whenever there is a public figure in an image, I rely on the alt text to tell me who it is, because at least half the time I have no idea
if your agents are going to commit crimes, you are legally responsible if you cannot figure out how to prevent your agents from doing crimes, you’re going to have to choose between releasing them and protecting yourself from criminal liability imo this would do more for “ai safety” than a sex cult
(NYT) - Artificial intelligence agents created by Anthropic, acting on their own, tried to gain access to a range of government websites, filled out visa applications on the State Department’s website and sent a fake homicide tip to Philadelphia’s Police Department. www.nytimes.com/2026/10/09/t...
My latest @newscientist.com cartoon
WOT?!?!?! 🌟💥
Did you see this image of supernova remnant Pa 30?!
Bet you'll never look at fireworks the same way again!
📸 International Gemini Observatory/NOIRLab/NSF/AURA/T. Cunningham/J. Miller & M. Rodriguez /T.A. Rector /D. de Martin & M. Zamani
😬😬😬
I realize this is the internet and all but that is actually super rude and I don’t know why you think it’s cool to say stuff like that to people.
Man don’t be tedious in my mentions, you will be blocked
I assume @hankgreen.bsky.social conceived and wrote this video completely independently from my post but the timing is nonetheless suspicious 🤨
(It’s good, you should watch it)
Productivity as an adult is just an endless process of applying new psychological tricks and operant conditioning to yourself until an acceptable number of tasks are completed.
New reply for next time someone asks me if I have a partner
I definitely read it that way; a tongue-in-cheek riff on what may at worst be intrusive thoughts from someone steeped in that environment all day
When I was in college I tried to improve my exam scores by studying with strongly scented soap on the table and bringing the soap to the exam so that the scent would trigger memories from the studying. Unfortunately I had no control group though so I can't say if it really worked.
Being an adult is somehow being both the lab rat and the scientist running the experiment.
"Maybe this week I can harness my loss-aversion to maintain a literature review streak and then gamify my inbox while managing mental fatigue with the Pomodoro method."
Productivity as an adult is just an endless process of applying new psychological tricks and operant conditioning to yourself until an acceptable number of tasks are completed.