Hey, readers, thanks so much! Picador US's trade paperback reprint of City of Saints & Madmen is now in an eighth printing? This was my break-out book back in 2002 and it's amazing to see it still reaching new readers over two decades later!

2025 ESCONI Rock, Mineral, and Fossil Swap Report #rocks #minerals #fossils #swap #rockswap www.esconi.org/esconi_earth...

After the Age of Dinosaurs is open this week! Here’s a 🧵 about our weird, trippy show about the weird, trippy recovery period after the end-Cretaceous extinction.

Registration for @CAVEPS_Palaeo conference is now open, secure your place here: pay.flinders.edu.au/SAE039 Visit the website for more info: www.caveps.org

MSc talk went well and my thesis was accepted with revisions. Thanks again to all of the folks who attended via zoom. I had a much larger turnout on zoom than I was anticipating, and seeing all of your names in the participant list was very encouraging this morning.

For those who are interested, I will be giving my MSc defense seminar tomorrow (August 21st) at 9AM Eastern time.  Password to enter is: Worthen Topic: Caleb Bohus MSc Defense Seminar Time: Aug 21, 2025 09:00 AM Eastern Time (US and Canada) Join Zoom Meeting carleton-ca.zoom.us/j/9476046076...

I will be giving my MSc defense talk next week on the 21st, at 9AM ET. My thesis is titled: “Description of a new species of colosteid from the latest Mississippian of North America, complete description of a 3D braincase and brain endocast”. It will be public, and I will share a zoom link next week

I’m quite found of blobs… What ever could this ugly thing be?

Want to do a PhD on White Sharks using high-powered imaging to analyse form and function of their teeth and jaws? You will work with me and the dream team @charlie-huveneers.bsky.social @meyer-sci.bsky.social @weisbeckerbblab.bsky.social & #SARDI at Flinders Uni 🦈🦷🦴 Interested? Get in touch!

🤓 Ordovician gastropoda from #lithuania 🇱🇹 #palaeontology #science #research #collection #museum #vilnius #nature #research #centre

Some photos from my recent trip to Uppsala, Sweden 🇸🇪

Not unexpected… but still cool. Defense is next Thursday 😳

Pledging to do something and then simply not doing it is an incredibly effective tactic that relies on us being too trusting and too literal of countries and companies www.theguardian.com/environment/...

Results from the #paleostream! Petrustitan (tackling Hatzegopteryx), Procyon megalokos approaching a Erethizon poyeri (a wish by @dynamoterror.bsky.social), Eophyseter and Calligenethlon

2025 ESCONI Gem, Mineral, and Fossil Show - Preview #5: Mazonova helmichnus #show #fossil #paleontology #MazonCreek #pennsylvanian #eggs www.esconi.org/esconi_earth...

This #FossilFriday is brought yo you by the Hell Creek gar that I found in 2012. Fun field fact: Were were stuck at camp for so long due to rain that I got to read @theauthorguy.bsky.social 's hilarious book "Lamb" for the first time. I've been hooked ever since. rmdrc.blogspot.com/2025/02/hell...

Missing Southern Illinois today, especially since this is prime fieldwork weather… no bugs and no plants to get in my way.

Some happy news: I’ll be co-hosting an educational hike with the Allegheny Land Trust at Barking Slopes Conservation Area on May 3rd, where I’ll be chatting a bit more about this special property and the fossils you can find on it. Register here:

Question for the fishy folks. These spines seem like they would be relatively diagnostic, but what acanthodian do these belong to? I’ve never seen anything like them.

How do you measure what isn't there? Elska did a fantastic job leading this paper on how we can measure the volume of changing, 3D spaces inside XROMM skeletal animations. And, importantly, how good are those volume measurements? journals.biologists.com/jeb/article/...

We are excited to announce a new faculty position here in Cambridge, for researchers in computational and/or theoretical biology, based jointly in Genetics and Mathematics. Come and join us! Happy to answer questions about research, teaching and working here. www.jobs.cam.ac.uk/job/50414/

This #paleoart shows 3 views of the Devonian brachiopod fossil Paraspirifer bownockeri; one is reconstructed w/ some epifauna and boreholes. These are fun to find; they're an impressive size (for brachiopods). I had an excellent specimen to use as a reference for this painting. #FossilFriday #sciart

Today has been filled with embolomeres and Smashing Pumpkins

Even *if* their fossil collections were somehow rehoused at other institutions, the potential closure of the Paleontological Research Institute would be an incalculable loss to specimen-based research. It would also eliminate an immensely important educational facility for students and the public. 🧪

The amazing brach gallery will make a humble brach lover cry with joy! 😀😀😀 The brand new Chengjiang Fossil Site Museum

Avian telencephalon and cerebellum volumes can be accurately estimated from digital brain endocasts

Mark Hollis Armitage, 2025. UV Autofluorescence Microscopy of Jaw Ground Sections from Seymouria , Broili, 1904, Reveals Clots in Vascular Canals. How do we know these are blood clots? I understand the clots are in the microvascular canals, but can we say these are clots caused by asphyxiation?

Myodural bridge in amphibians as well as myodural bridge-like structures in fish. The myodural bridge might be a conserved, but widespread, feature in vertebrates.

Excited to share our new preprint, Tooth development in frogs: Implications for the re-evolution of lost mandibular teeth and the origin of a morphological innovation doi.org/10.1101/2025...

Very interesting paper on Amji’s salamander. The stapes possesses a stapedial foramen, something thought to be absent in salamanders and frogs. The skeletal anatomy of more herpetofauna can and should be described via micro CT.

Nature is proud to be associated with a new award for women in technology. The world needs more prizes for exceptional researchers and innovators https://go.nature.com/4gNzXqh

“TETRAPOD REMAINS FROM THE EWING LIMESTONE (CARBONIFEROUS: KASIMOVIAN) OF OHIO” Another fun abstract accepted. Anthracosaur jaw of some sort? Embolomere? Neopteroplax? Looking forward to seeing this prepped.

Elisabeth Vrba, the musketeer of macroevolution "Curious, brilliant, and fiercely independent—Elisabeth Vrba dedicated her life to understanding the great forces shaping the history of life."

On Ossirarus kierani, a stem tetrapod from the Tournaisian of Burnmouth, Berwickshire, Scotland, and the phylogeny of early tetrapods fr.pensoft.net/article/1264...htt

For a late night doodle, have Calligenethlon creature. yippee..

Presented some exciting paleo work from NB as part of the NB Alliance. I can’t share much right now, but it’s something exceptional! 🦎🌴

Last Thursday, a publication I coauthored was published in The Zoological Journal of the Linnean Society. In the publication, we provided a revised diagnosis and description of the Pennsylvanian embolomere Calligenethlon watsoni. The data can be accessed @ MorphoSource.org via media # 0006677245

“You’ll be visited by three spirits” The three spirits:

Album cover for Tetrapod Dream by the Smashing Colosteids. One of the few Canadian colosteids… and one in a rather sorry state of preservation.

So happy to see this piece! You are killing it dude! Keep up the good work 🐸

Starting a cover band called “Smashing Colosteids”