iiinova — where your digital self keeps evolving

Jean-François Cudennec @limpetnerd.eurosky.social · 27/09/2026

So a bird (wood pigeon ?) crashed into our window, and the detail of the feather structure imprinted on the glass is just… 🤯🦉

The marks left by the bird on the window : the silhouette and wing can clearly be seen

3171

Jean-François Cudennec @limpetnerd.eurosky.social · 25/09/2026

🦉Since we moved, we've been blessed with a tawny owl calling from somewhere in our garden almost every night. I've always been a hopeless owl chaser and have never managed to find one myself (let alone photograph one). Any tips? Where to look, best time to go out…

170

Jean-François Cudennec @limpetnerd.eurosky.social · 23/09/2026

I’ve been quiet lately: fieldwork on an uninhabited island, workshops with students, buying our dream house (and its forest), moving in 2 dogs + 2 kids, a baby due this winter… Not much time left for shitposting. The hardest part? Staying focused while limpets still occupy 99% of my brain.

Two kids looking at lush trees through a large window

Prospection on Beniguet island, the Britton flag proudly displayed on the dGPS

An infant jawbone, dated back to early middle age
Béniguet - France

1140

Reposted by Jean-François Cudennec

c milagros @bibibivalve.bsky.social · 30/07/2026

cant be normal about Cenozoic molluscan taxonomy I’m so so sorry

2113

Reposted by Jean-François Cudennec

Dave Rodland @daverodland.bsky.social · 24/07/2026

I missed #MolluskMonday this week, so #FossilFriday is doing double duty with a small inoceramid. These bivalves could grow well over a meter across in the Cretaceous Interior Seaway, and it is generally suspected that they harbored some variety of sulfur metabolizing bacteria as chemosymbiotes. ⚒️🧪🦪

Label:
"Inoceramus barabina
Cretaceous
Locality unknown"

1215

Jean-François Cudennec @limpetnerd.eurosky.social · 24/07/2026

The vertical design (D) has a very cool detail : the species’ call is also represented

Detail of the 10 euros banknote, with a sonogram of the species vocalisation

0182

Jean-François Cudennec @limpetnerd.eurosky.social · 24/07/2026

The bluest blue I’ve ever seen 💙 Gentiana sp. (Brachyphylla maybe?)

A small patch of deep blue flowers growing among the rocks, somewhere in the Vanoise massif, at 2800 m asl

1476

Jean-François Cudennec @limpetnerd.eurosky.social · 24/07/2026

Completely obsessed by these euro banknote design proposals 🦉 Ursula, give us the bird money !

4428

Reposted by Jean-François Cudennec

Tom Sharpe @tomsharperocks.bsky.social · 20/07/2026

#MolluscMonday: the diamond-shaped cross section of a Pinna shell in life position, silicified and infilled with chalcedony. Lower Lias (Early Jurassic), Glamorgan coast, South Wales.

Grey limestone rock with a diamond-shaped shell infilled with a white & grey mineral.

1485

Jean-François Cudennec @limpetnerd.eurosky.social · 20/07/2026

This summer the fields turned yellow, the beaches turned green and the only thing left to harvest is what rots in the sand. But Argentina lost, so it’s all good.

A beach in Brittany, covered by a green tide (Ulva sp.). A tractor is collecting the rotting sea weed to prevent sanitary issues.

0140

Jean-François Cudennec @limpetnerd.eurosky.social · 19/07/2026

Yeah intensive livestock farming may be a monstrosity against animal welfare and both a climatic sanitary plague, but at least coastal ecosystems are devastated.

A spectacular green tide (Ulva sp.) in the bay of Douarnenez, Brittany, France.

084

Reposted by Jean-François Cudennec

Adiel Klompmaker @paleoadiel.bsky.social · 17/07/2026

#FossilFriday‼️ 😲 Who does not like a well-preserved, large Cretaceous oyster like this Exogyra ponderosa? This one comes even with a repair scar! Campanian-aged Demopolis Formation, Alabama. Specimen: The University of Alabama Museums Research & Collections. #paleontology #fossil

2427

Reposted by Jean-François Cudennec

Matt Bracken @brackenlab.bsky.social · 14/07/2026

Where intertidal rocky reefs are composed of “soft” rock - such as the sedimentary mudstones and sandstones of the Point Arena Formation in Mendocino County, California - sea urchins create circular niches by abrading the substratum. #MarineLife #SwelterShelterNSF 🌊🦑

A bunch of purple urchins (*Strongylocentrotus purpuratus*) in their concave, circular niches, along with one sea anemone (*Anthopleura sola*) taking advantage of an otherwise unoccupied niche. They are surrounded by pink, encrusting coralline algae.

211025

Jean-François Cudennec @limpetnerd.eurosky.social · 15/07/2026

Anthropocene is cancelled. Welcome to Pyrocene 🔥

091

Jean-François Cudennec @limpetnerd.eurosky.social · 15/07/2026

Limpets graze biofilm using their radula, a tongue like structure covered in tiny teeth, leaving specific markings on the rocks. Modelling works shows that these animals are close to the optimum when it comes to cover a surface by crawling, and without passing two time on the same spot 🦑🌊🌍🌿

Grazing marks from common limpets on a rock.

Credit : Laetitia Beauverger

Source : https://www.pnas.org/doi/epdf/10.1073/pnas.1405966111

1113

Jean-François Cudennec @limpetnerd.eurosky.social · 13/07/2026

End of heatwave has been postponed, again. And another one has been scheduled for the end of July. Dreaming of « The atrium of a Roman house during heavy rain » by Luigi Bazzani, 1882.

« The atrium of a Roman house during heavy rain » by Luigi Bazzani, 1882.

060

Jean-François Cudennec @limpetnerd.eurosky.social · 10/07/2026

Scaphopods were also widely used as ornaments by prehistoric people: with an opening on both ends of the shell, they are particularly convenient to hang on a thread. But since they’re underwater critters, they were usually digged from fossil beds (happened at least in France and N. America)

Scaphopods ornaments in prehistoric grave

2152

Jean-François Cudennec @limpetnerd.eurosky.social · 10/07/2026

1/ Yay, Coralline Crag mentioned ! 🎉 This formation contains puzzling evidences for both warm and cold climates, and since the Pliocene is a good analog for a +2 °C/450 ppm CO2 planet, understanding what’s happening there is crucial for…

1105

Jean-François Cudennec @limpetnerd.eurosky.social · 10/07/2026

My optimistic side wants to think that if my Discover feed is so lame, it’s because of the algorithm, not because people here are intrinsically boring.

120

Jean-François Cudennec @limpetnerd.eurosky.social · 30/06/2026

You liked the flash flood ? I hope you’ll like the flash drought

093

Jean-François Cudennec @limpetnerd.eurosky.social · 30/06/2026

France: just endured two consecutive historic heatwaves, with a third on the way (and it’s not even July yet) French authorities: don’t address the criticism about mass mortality and lack of preparation, but give the green light to a controversial climate-wrecking highway project.

« final go-ahead for this controversial project: the Council of State has approved the environmental permit for the A69 motorway »

051

Jean-François Cudennec @limpetnerd.eurosky.social · 24/06/2026

My little limpets are in the spotlight again! 🐚 Few weeks ago I got to share my passion for these remarkable molluscs with BBC Springwatch who dedicated a few minutes of airtime to this humble mollusc.. Watch it here (VPN needed if you're outside the UK) 👇 🌊🧪🦑🌿🌍

bbc.co.uk

BBC Two - Springwatch, 2026, Episode 10

The nests at National Trust Crom are bursting at the seams with fledging chicks.

1103

Reposted by Jean-François Cudennec

Katharine Hayhoe @katharinehayhoe.com · 23/06/2026

Climate.us is officially live! After NOAA ended Climate.gov’s day-to-day operations in 2025, former team members built Climate.us to carry that work forward. Their explanations and graphics have always stood out to me as clear, accessible, and transparent. I’m really looking forward to this reboot.

climate.us

Climate.us Home

independent, nonprofit, and immune to politics

3925811221

Jean-François Cudennec @limpetnerd.eurosky.social · 23/06/2026

Careful with all the AMOC fuss. It's a mathematical construction, not a "conveyor belt". For now its decline is well below natural variability. And no "dramatic AMOC collapse" will save Europe from heatwaves. If anything, a weaker AMOC may even worsen these events.

1115

Jean-François Cudennec @limpetnerd.eurosky.social · 19/06/2026

Looking at these graphs, thinking of my kids

Daily mean temperature, year 2026, France.

Almost always over the decadal average, with already one strong heatwave, and a second one being forecasted to be even way more hot

1328

Jean-François Cudennec @limpetnerd.eurosky.social · 17/06/2026

Economy and ecology are the same word: oikos, the household. One runs it, one reads it. The tragedy of the commons is where the halves grind. Hardin said shared resources are doomed & competition is inherently unstable. A crowded Breton rock full of limpets proves him wrong twice👇 🌊🦑🌍

open.substack.com

A Natural History of Limpets, Part 4: The Commons on the Rock

Three species, one crowded rock, and the resource an earlier episode called the scarcest of all. Garrett Hardin predicted ruin here twice. The shore refused him both times.

12710

Reposted by Jean-François Cudennec

Sciences Ouest @sciencesouest.bsky.social · 11/06/2026

🌊 À l'interface entre terre et mer, l'estran se découvre et se recouvre au rythme des marées. Zone refuge, abri pour la biodiversité, gardienne de vestiges archéologiques : ce milieu joue un rôle important dans le littoral breton.

espace-sciences.org

L’estran, au rythme des marées | Sciences Ouest

À l’interface entre la terre et la mer se dessine un milieu unique en son genre. Tour à tour découvert et recouvert par l’océan, il évolue au rythme des marées, abritant une biodiversité riche et comp...

0155

Jean-François Cudennec @limpetnerd.eurosky.social · 08/06/2026

Fresh off the bench: a very cool pot base with classic Bell Beaker decoration, from last year’s excavation on our island shell middens. #PaleoSky 🏺

A pot shard standing on a pile of limpet shells

Detail of the pot shard, with distinct decoration

1131

Reposted by Jean-François Cudennec

donaldé @donalde.bsky.social · 03/06/2026

‘The Pokédex was a metaphysics’ open.substack.com/pub/thelimpe... top drawer science writing from @limpetnerd.eurosky.social - come for the Pokémon. Stay for Linnaeus, speciation and the conceptual issues that creating definite categories creates when applied to the messiness of the real world.

222

Jean-François Cudennec @limpetnerd.eurosky.social · 29/05/2026

As an amateur naturalist, I listed the species found in my area and asked Claude to build a 3D model of the interactions between them. The ecosystem is nicely structured around the two large green balls (oak and beech). It looks messy, but you can navigate through it and add taxa manually.

The ecosystem reconstruction : dots of different size/colors linked by arrows of different colors representing the different types of interactions

130

Reposted by Jean-François Cudennec

Emma @emmasartworks.bsky.social · 27/05/2026

Seashell studies in watercolour. #art 🐡

Watercolour studies of seashells from Hartlepool, northeast England - Ocean Quahog, Pullet Carpet Shell, Rayed Artemis and Smooth Artemis

419636

Reposted by Jean-François Cudennec

Journal of Geek Studies @jgeekstudies.bsky.social · 25/05/2026

Happy #GeekPrideDay & #TowelDay! 🎉🎉 What better way to commemorate than catching up on some #geekstudies? Take a look at our ongoing 2026 volume and see what we've been up to so far: jgeekstudies.org/archives/vol...

Cover of the 2026 Volume of the Journal of Geek Studies, showing a phylogenetic tree of the wyverns from the Monster Hunter games.

021

Reposted by Jean-François Cudennec

Michael LaFrance @mlafrance.bsky.social · 25/05/2026

A livestream of a volcano in the Philippines captured a meteor crashing to Earth today. What are the odds? Mayon Volcano, Location: Albay, Luzon, Philippines

616288339436

Jean-François Cudennec @limpetnerd.eurosky.social · 25/05/2026

The sea surface temperature in the Bay of Brest with see a 10°C increase in just one week. The usual summer temperature maximum is somewhere around 20 °C, and is normally reached in August. One of the most studied coastal ecosystem in the world, turned into a hot marine stew. shorturl.at/Sg8ss

Top : iroise sea/bay of Brest sst for the 20/05/2026, at 13 degrees Celsius
Bottoms : the same map, but for the 27/05/2026, reaching 23 degrees.

0156

Jean-François Cudennec @limpetnerd.eurosky.social · 24/05/2026

Having a cnidarian (Velella velella, the purple sail) using the winds to sail across the ocean is already cool, but TIL that this species has different morphs to catch the dominant winds (east/west) in the Pacific Ocean. (Also, have you seen these growth rings ?? 👀)

https://bioobs.fr/blog/fiche-espece/?id_espece=202

Figure from Cameron et al (2023)

https://www.researchgate.net/publication/372860179_Strong_chiral_optical_force_for_small_chiral_molecules_based_on_electric-dipole_interactions_inspired_by_the_asymmetrical_hydrozoan_Velella_velella

1284

Jean-François Cudennec @limpetnerd.eurosky.social · 24/05/2026

Ep. 3 of “A Natural History of Limpets” is out! Here I show how these animals are not just evolutionary marvels and biomechanical fortresses, but keystone species of rocky shores, and how they helped define the basic principles of ecology as a scientific field 👇

open.substack.com

A Natural History of Limpets, Part 3: The Shore That Never Settles

From barnacle belts to limpet grazing fronts, rocky shores shaped by disturbance taught ecologists how communities are built and undone.

33813

Jean-François Cudennec @limpetnerd.eurosky.social · 23/05/2026

My daughter, 5yo, to the other kids at the playground : « so, the radula is like a tongue for the snails, but covered in teeth ! »

A kids hand pointing to radula grazing marks from snails or slugs on the playground structure

0446

Reposted by Jean-François Cudennec

Leibniz-Zentrum für Archäologie (LEIZA) @leizarchaeology.bsky.social · 21/05/2026

Big congratulations to Danai Theodoraki on publishing her thesis on Neolithic Franchthi and high-resolution climate variability! The publication is now out here: doi.org/10.11588/pro... #LEIZArchaeology #Archaeology #Research

283

Reposted by Jean-François Cudennec

Alisa Bokulich @alisabokulich.bsky.social · 13/05/2026

Does anyone have a pdf of this chapter they could please share with me? Thomas JM Schopf (1972) “Varieties of paleobiologic experience” in book /Models in Paleobiology/. ⚒️ #paleosky #paleobio

4910

Jean-François Cudennec @limpetnerd.eurosky.social · 11/05/2026

Facebook meme groups may not be completely dead

Cartoon displaying the absurd complexity of the « simplified northwest Atlantic food web »

084

Jean-François Cudennec @limpetnerd.eurosky.social · 05/05/2026

Yesterday we wandered in the « Eastern hyper-oceanic barrens ecoregion » of Newfoundland to walk in socks on the oldest animal ever known (Ediacaran fauna, Avalonian period) at Mistaken Point. And this Beothukis ? The holotype, still in situ. What a day ! #PaleoSky ⚒️

The eastern hyper oceanic barren ecoregion : no trees, but a lot of wind

The fossil surface of Mistaken point. The sea floor was covered in ash layer, preserving the fossils

3329