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@spiffyscientist.bsky.social

stem cell biology nerd. trans menace 🏳️‍⚧️. will do anything to pet a dog. BayFC. (they/them) all views mine, don’t reflect academic/professional institutions, etc

Good 🧵 on recent fate mapping of mid-hindbrain boundaries using seperate lineage tracers, with authors concluding that we have two separately specified CNS regions. But we knew this for a couple decades now, and there is much more finessing of brain specification than simply “two brains”.

John Timmer@jtimmer.bsky.social · last mo.

Ok, this "there are two separate brains" thing appears to be making the rounds, and I want to be absolutely clear: this is a press office overhyping some perfectly reasonable science that won't come as a surprise to most developmental biologists.

Waymo has halted service in San Francisco after numerous videos & images showed its autonomous cars snarling traffic during the blackout. With traffic lights down, Waymos across the city stopped dead in their tracks at intersections. missionlocal.org/2025/12/sf-w...

Waymo halts service during massive S.F. blackout after causing traffic jams

Waymo stopped its service across San Francisco on Saturday after numerous autonomous vehicles caused traffic jams in the city.

missionlocal.org

Bonkers day in San Francisco. 1. HUGE power outage across the city. 2. The Palace Hotel has been evacuated and part of Market St. shut down after reports of shots fired and a hostage negotiator team is on site. 3. A car is fully engulfed in the Stonestown mall parking lot.

Can’t believe the whole country has to suffer through the return of Dickensian childhood diseases because the worst, most ignorant attention-demanders decided other people’s expertise makes them feel bad

Yes, some people's legacies are complicated. For example, Watson. After all, though he was racist, don't forget his other traits. For example, he was also sexist. And also anti-semitic. And a data / idea thief. So let's not forget all the different facets.