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John Timmer

@jtimmer.bsky.social
5.7K followers 378 following 2.3K posts

Ars Technica's science editor. Various other things that are far less interesting. Check my author profile on Ars for my email. jtimmer.95 on Signal.

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John Timmer @jtimmer.bsky.social · 15h
Oh, wow, I see that that's a model with the Bosch ABS system - definitely would love to hear what that's like in use. I'm imagining it would be superfluous for experienced cyclists, but maybe I'm wrong?
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John Timmer @jtimmer.bsky.social · 15h
Oh, very nice. I've been meaning to ask Tern for something to review because I've heard so many good things about them, but have been too busy with other companies' models this year. Looking forward to seeing reports on how you're enjoying it.
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John Timmer @jtimmer.bsky.social · 19h
Oooh, what's the manufacturer? It doesn't look like one I'm familiar with.
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John Timmer @jtimmer.bsky.social · 08/10/2026
I'm not sure it's a consolation that he's too stupid to realize how closely he's following the Nazi playbook.
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John Timmer @jtimmer.bsky.social · 08/10/2026
Ukrainians showing that it is possible to limit data center growth.
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John Timmer @jtimmer.bsky.social · 08/10/2026
This is a very cool finding, and has echoes of the Nobel Prize for optogenetics, 1/3 of which went to the person who found a sensory ion channel in a single-celled algae.
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John Timmer @jtimmer.bsky.social · 07/10/2026
I can echo this. Both my parents died before they hit 71, and my one older sibling has dementia. A lot of _my own_ history is now unavailable or disjointed because I can no longer get any help with putting my earliest memories into context.
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John Timmer @jtimmer.bsky.social · 06/10/2026
NSF still doesn't have a director over a year and a half after the last one left.
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Geoff Brumfiel @gbrumfiel.bsky.social · 06/10/2026
The IceCube neutrino detector has won the 2026 Nobel Prize in physics. The Trump administration has proposed slashing its budget in half in 2027.
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John Timmer @jtimmer.bsky.social · 05/10/2026
I swear I've read this article an average of every eight years for the past.... when was it I was waiting in the car with my mom in line for rationed gasoline during the Arab oil embargo?
nytimes.com
Sales of Hulking Pickups and S.U.V.s Sag as Fuel Prices Soar
Sales of big pickup trucks and sport utility vehicles have dipped as more Americans buy hybrids and smaller cars.
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John Timmer @jtimmer.bsky.social · 04/10/2026
And now they're under attack on all sides. The administration doesn't want to fund them, doesn't want them in the country, wants to kill the programs that gave many of them opportunities they would never have gotten otherwise. And they just keep going into work anyway.
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John Timmer @jtimmer.bsky.social · 04/10/2026
They look like the urban populations that right wing politicians have repeatedly said don't represent "real America", and have lately professed to fearing. Yet they're working insane hours for low salaries to put US taxpayers' money to the best use it can possibly be put to.
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John Timmer @jtimmer.bsky.social · 04/10/2026
I hate to hijack this guy's well earned celebration, but I suspect that most of the public has no clue that _this is what a typical lab looks like_. A diverse bunch, many immigrants, from a huge range of backgrounds. And they're the ones coming up with new cures, new facts, new technologies.
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John Timmer @jtimmer.bsky.social · 03/10/2026
In the two fields I've been in—academics and journalism—we have a surplus of excellent people who have not engaged in antisocial behavior but are struggling to find jobs. I don't understand why so many people feel they should take a back seat behind people who have.
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David Ho @davidho.bsky.social · 02/10/2026
Oh retractionwatch.com/2026/10/02/p...
David Ho, a climate scientist at the University of Hawaii, responded to our request for comment on the paper by saying he was not interested in reading it. “I’m sorry, but I’d rather keep my brain cells,” he said.
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John Timmer @jtimmer.bsky.social · 02/10/2026
We've come a long way from when Republicans thought they could make common cause with the people they viewed as "model minorities". It's just 24/7 racism now.
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John Timmer @jtimmer.bsky.social · 02/10/2026
Wait, aren't you a cosmologist? What are you doing excelling with precision instruments?
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John Timmer @jtimmer.bsky.social · 30/09/2026
I hope those "fretting" aides get prosecuted, given they're going along with something they know is illegal.
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John Timmer @jtimmer.bsky.social · 30/09/2026
What he's trying to say is that, unlike doctors, AI is trained on all the random bullshit and conspiracy mongering found on the internet, and therefore more likely to agree with his ideas.
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John Timmer @jtimmer.bsky.social · 29/09/2026
To give an example I know: Trump is claiming an "energy emergency", and using it to order coal plants to stay open. When the order expires, he simply issues a second. Defining "emergency" as an actual power shortage, eliminating the extension option, etc. are all simple legislative fixes.
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John Timmer @jtimmer.bsky.social · 29/09/2026
We also need to think of Trump II as the equivalent of IT penetration testing, but for democracy. Someone's just gone through and identified lots of possible exploits. How can we shut them down while preserving the useful stuff?
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John Timmer @jtimmer.bsky.social · 29/09/2026
Thinking about this a bit: is imposter syndrome the antithesis of Dunning-Kruger?
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Needhi Bhalla 💅🏽 @needhibhalla.bsky.social · 29/09/2026
The wrong fucking people have imposter syndrome
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John Timmer @jtimmer.bsky.social · 29/09/2026
One of the likely results of the midterms will be that we won't have to listen to this yahoo mindlessly lying to us for at least two years. And I am here for that.
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John Timmer @jtimmer.bsky.social · 28/09/2026
I don't know what this says about how Anthropic identified these in the first place, but I'd be surprised if the failure to repeat isn't significant in that regard.
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John Timmer @jtimmer.bsky.social · 28/09/2026
An interesting thing that may be relevant here: If you go to Anthropic's pre-print, they say that they re-ran the analysis and "the array was missed in every rerun." (The array being a diagnostic series of repeats.) So, for whatever reason, the AI mostly misses these.
www-cdn.anthropic.com
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Carl Zimmer @carlzimmer.com · 27/09/2026
Four days ago, a scientist was surprised by the news that Anthropic discovered new virus genes for making DNA. He says he’s been studying them for years—and feeding his data to Anthropic’s AI as part of his own research. Coincidence? Here’s my story. nyti.ms/3VSWayc
nyti.ms
Did Anthropic’s A.I. Really Make a Scientific Discovery on Its Own? (Gift Article)
An expert at the University of Copenhagen said his team had been sharing its research with the company’s A.I. model, Claude, and that its new finding matched their work.
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John Timmer @jtimmer.bsky.social · 27/09/2026
A great story about one of the cooler organisms on the planet - Paulinella, which I didn't even know existed as recently as a decade or so ago.
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John Timmer @jtimmer.bsky.social · 25/09/2026
Wind is also about two years away from matching coal. Two major offshore wind farms (including VA's 2.6GW farm) should come online later this year, which should give it a boost. So, there's a good chance that coal will drop to 5th place behind nat gas, nuclear, and the two big renewables.
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John Timmer @jtimmer.bsky.social · 25/09/2026
Looking over trends a bit more carefully: At growth rates similar to this year, two years from now, utility scale solar alone will be very close to total coal generation. With rooftop thrown in, it will be producing more energy (though not all of that will show up on the grid).
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John Timmer @jtimmer.bsky.social · 25/09/2026
(I'm not sure how many people outside of biology realize how nightmarish it is to face the all-too-common situation of "here's a protein where we have absolutely no clue about its function, and you have to figure it out.")
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John Timmer @jtimmer.bsky.social · 25/09/2026
None of those are very easy questions to answer, which is probably why Anthropic has not done any of them. But if they want this story to be anything more than "AI spots weird pattern", then they'll either have to dive in, or wait for actual biologists to extend their work.
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John Timmer @jtimmer.bsky.social · 25/09/2026
So, as a lot of people are saying, there is a lot of biology to do here: Are these repeat RNA's processed? If so, by what? Is this actually a reverse transcriptase? Are the accessory proteins part of a system, or just happens to be nearby due to genome constraints? What do the accessories do?
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John Timmer @jtimmer.bsky.social · 25/09/2026
(I know nothing about this phage family, so don't know how compact or rigorously structured their genomes tend to be. So I don't know how unexpected finding these genes or larger non-coding regions is here. Anthropic's draft doesn't tell us, either.)
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John Timmer @jtimmer.bsky.social · 25/09/2026
There are at least four separate types of accessory proteins. Only one of these has sequence homologies that suggest a potential function. None of them have been tested for any function.
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John Timmer @jtimmer.bsky.social · 25/09/2026
The repeats are associated with a reverse transcriptase homolog and an associated protein. They have not confirmed that this is a functional RT except by noting the preservation of catalytic residues.
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John Timmer @jtimmer.bsky.social · 25/09/2026
The repeats are found in a group of phages, and get made into processed RNAs after infection. Not clear if that's functional or if the secondary structure of the RNA just leads to consistent digestion products.
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John Timmer @jtimmer.bsky.social · 25/09/2026
That's the sort of thing that AIs are almost certainly much better than humans at. But if they repeated the analysis, the AI generally missed them. So not obvious why it got lucky here?
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John Timmer @jtimmer.bsky.social · 25/09/2026
Ok, I've quickly gone through the technical doc Anthropic released about its newly-found repeat associated protein. A short summary thread: The AI did a great job of identifying a pattern that humans could easily have overlooked (relatively short repeats with lots of intervening DNA).
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John Timmer @jtimmer.bsky.social · 25/09/2026
For the first seven months of 2026, the US saw photovoltaics (both utility and small-scale) generate 72 percent of the electricity produce by burning coal. Barring a dramatic change in trends, we're probably about two years from solar passing coal for annual generation. Data from US EIA.
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Aaron Rupar @atrupar.com · 24/09/2026
OMG -- under questioning from Hassan, Trump's FDA nominee Heidi Overton refuses to acknowledge that Trump can ever be wrong about anything even after she's confronted with a specific example of something Trump is clearly wrong about
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John Timmer @jtimmer.bsky.social · 24/09/2026
Exactly why I mentioned objective standards.
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John Timmer @jtimmer.bsky.social · 24/09/2026
Between him and Feinstein, it's pretty clear that we need a rough equivalent of the 25th amendment for Congress. Except one with some objective standards so that a congressional majority can't just ignore the problems.
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John Timmer @jtimmer.bsky.social · 23/09/2026
So, I turned my chaotic little developmental biology rant into an actual article that is hopefully somewhat less chaotic and a bit more approachable.
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John Timmer @jtimmer.bsky.social · 22/09/2026
Yeah, I expect that this will be blocked by the lower courts (which is what that sentence is about) and, if we're lucky, will take long enough to get to the Supreme Court that we'll be looking at the end of the term.
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John Timmer @jtimmer.bsky.social · 22/09/2026
I should hope so - my personal favorite among my handful of papers was published there.
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John Timmer @jtimmer.bsky.social · 22/09/2026
Appreciating Bluesky this morning after having written a developmental biology lecture in the form of a rant and waking up to find it's one of the more popular things I've ever posted here.
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John Timmer @jtimmer.bsky.social · 22/09/2026
Oh, god, I had forgotten all about rhombomeres.
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John Timmer @jtimmer.bsky.social · 22/09/2026
Relief to hear that, given I've been out of the field for an embarrassing number of years now.
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John Timmer @jtimmer.bsky.social · 22/09/2026
(Also, things are weird in the chicken embryo, where the nervous system is formed gradually from head to tail. So you've got clear structures forming in the brain before a lot of the cells that will be the spinal cord even know they're going to be neural.)
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