Jean-François Cudennec
@jfcudennec.bsky.social
PhD. Old mollusks lover : Sclerochronology and isotopes in archaeological or paleontological context.
#PaleoSky curator and limpet nerd.
Also nature photographer:
https://bsky.app/profile/jfcphotos.bsky.social
#PaleoSky curator and limpet nerd.
Also nature photographer:
https://bsky.app/profile/jfcphotos.bsky.social
🏺Facebook archaeology groups might not be completely dead after all
December 27, 2025 at 8:38 AM
🏺Facebook archaeology groups might not be completely dead after all
🪶 Just a few days after this post, a remarkable bird is causing a stir in a small village of my native Brittany: a Belted Kingfisher, coming from North America.
As a result, between 30 and 40 twitchers on site, , coming from all over the country, sometimes up to 150 ??
As a result, between 30 and 40 twitchers on site, , coming from all over the country, sometimes up to 150 ??
December 21, 2025 at 4:18 PM
🪶 Just a few days after this post, a remarkable bird is causing a stir in a small village of my native Brittany: a Belted Kingfisher, coming from North America.
As a result, between 30 and 40 twitchers on site, , coming from all over the country, sometimes up to 150 ??
As a result, between 30 and 40 twitchers on site, , coming from all over the country, sometimes up to 150 ??
Happy winter solstice ! ❄️🌞
December 21, 2025 at 4:05 PM
Happy winter solstice ! ❄️🌞
External and SEM pictures of Cardita antiquatus (left), living in Tunisia today, and Centrocardita squamulosa ampla (right), that lived in the North Sea, 4 million years ago.
They are both about the same size, but the modern one is 3/4 years old while the fossil one is about 30.
#FossilFriday
They are both about the same size, but the modern one is 3/4 years old while the fossil one is about 30.
#FossilFriday
December 19, 2025 at 10:18 AM
External and SEM pictures of Cardita antiquatus (left), living in Tunisia today, and Centrocardita squamulosa ampla (right), that lived in the North Sea, 4 million years ago.
They are both about the same size, but the modern one is 3/4 years old while the fossil one is about 30.
#FossilFriday
They are both about the same size, but the modern one is 3/4 years old while the fossil one is about 30.
#FossilFriday
Reposted by Jean-François Cudennec
On the 4th day of fossils, my true love gave to me...
A 4 toed amphibian track!
Batrachichnus is from the Carboniferous Mansfield Formation of southern Indiana. This is the name of the trace fossil because it's unknown exactly what animal produced it. The print is ~2cm long.
1/x
#12DaysofFossils
A 4 toed amphibian track!
Batrachichnus is from the Carboniferous Mansfield Formation of southern Indiana. This is the name of the trace fossil because it's unknown exactly what animal produced it. The print is ~2cm long.
1/x
#12DaysofFossils
December 17, 2025 at 7:17 PM
On the 4th day of fossils, my true love gave to me...
A 4 toed amphibian track!
Batrachichnus is from the Carboniferous Mansfield Formation of southern Indiana. This is the name of the trace fossil because it's unknown exactly what animal produced it. The print is ~2cm long.
1/x
#12DaysofFossils
A 4 toed amphibian track!
Batrachichnus is from the Carboniferous Mansfield Formation of southern Indiana. This is the name of the trace fossil because it's unknown exactly what animal produced it. The print is ~2cm long.
1/x
#12DaysofFossils
I once thought wildlife photography could raise awareness of biodiversity loss.
Yet with the hobby's popularization and gear affordability, the race for clicks and likes has seemingly outweighed the conservation value.
And I say this as a practitioner myself.
www.theguardian.com/environment/...
Yet with the hobby's popularization and gear affordability, the race for clicks and likes has seemingly outweighed the conservation value.
And I say this as a practitioner myself.
www.theguardian.com/environment/...
‘Magical’ galaxy frogs disappear after reports of photographers destroying their habitats
Researcher in Kerala rainforest sounds alarm after being told frogs had died after being handled by humans
www.theguardian.com
December 17, 2025 at 9:41 AM
I once thought wildlife photography could raise awareness of biodiversity loss.
Yet with the hobby's popularization and gear affordability, the race for clicks and likes has seemingly outweighed the conservation value.
And I say this as a practitioner myself.
www.theguardian.com/environment/...
Yet with the hobby's popularization and gear affordability, the race for clicks and likes has seemingly outweighed the conservation value.
And I say this as a practitioner myself.
www.theguardian.com/environment/...
🏺 For #TombTuesday, nothing less than the oldest monument of Europe : the Cairn of Barnenez (Finistère, France).
A 75m long chambered cairn , 2300 years older than the Great Pyramids of Egypt, made of 11 different chambers.
As André Malraux called it, "a true prehistoric Parthenon".
A 75m long chambered cairn , 2300 years older than the Great Pyramids of Egypt, made of 11 different chambers.
As André Malraux called it, "a true prehistoric Parthenon".
December 16, 2025 at 12:36 PM
🏺 For #TombTuesday, nothing less than the oldest monument of Europe : the Cairn of Barnenez (Finistère, France).
A 75m long chambered cairn , 2300 years older than the Great Pyramids of Egypt, made of 11 different chambers.
As André Malraux called it, "a true prehistoric Parthenon".
A 75m long chambered cairn , 2300 years older than the Great Pyramids of Egypt, made of 11 different chambers.
As André Malraux called it, "a true prehistoric Parthenon".
+1 point pour la dame des sciences à la radio 🫶
Ce n’était pas à moi que la question était posée ;) l’intéressé a répondu le XIXeme,
Pour moi, c’est bien trop difficile de choisir ! Mais j’irais naturellement vers la protohistoire 🙏
Pour moi, c’est bien trop difficile de choisir ! Mais j’irais naturellement vers la protohistoire 🙏
December 16, 2025 at 12:19 PM
+1 point pour la dame des sciences à la radio 🫶
What if the real treasure was the grant proposal we wrote along the way ?
December 16, 2025 at 12:13 PM
What if the real treasure was the grant proposal we wrote along the way ?
🌍 Human impact is largely associated with biodiversity decline, but in Holocene Europe (11,700–150 years BP), human ecological influence led to increasing landscape, habitat and biological diversity.
onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com/doi/10.1111/...
Increased Holocene Diversity in Europe Linked to Human‐Associated Vegetation Change
Aim It is widely reported that aspects of present-day global biodiversity are declining, with humans largely to blame. However—perhaps paradoxically—in Europe, floristic diversity and human populati...
onlinelibrary.wiley.com
December 16, 2025 at 10:30 AM
🌍 Human impact is largely associated with biodiversity decline, but in Holocene Europe (11,700–150 years BP), human ecological influence led to increasing landscape, habitat and biological diversity.
onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com/doi/10.1111/...
Finally !
"Stone Simulator" has deployed a free multiplayer update on Steam.
Becoming a stationary stone and observing environmental changes over simulated time can now be done with four of your friends in the same lobby !
⚒️ 👾
"Stone Simulator" has deployed a free multiplayer update on Steam.
Becoming a stationary stone and observing environmental changes over simulated time can now be done with four of your friends in the same lobby !
⚒️ 👾
December 15, 2025 at 11:23 PM
Finally !
"Stone Simulator" has deployed a free multiplayer update on Steam.
Becoming a stationary stone and observing environmental changes over simulated time can now be done with four of your friends in the same lobby !
⚒️ 👾
"Stone Simulator" has deployed a free multiplayer update on Steam.
Becoming a stationary stone and observing environmental changes over simulated time can now be done with four of your friends in the same lobby !
⚒️ 👾
General De Gaulle visits Military Uranium Enrichment Plant at Pierrelate.
We already had Giscardpunk, but how about De Gaulle the Techno-Priest ?
We already had Giscardpunk, but how about De Gaulle the Techno-Priest ?
December 15, 2025 at 7:40 PM
General De Gaulle visits Military Uranium Enrichment Plant at Pierrelate.
We already had Giscardpunk, but how about De Gaulle the Techno-Priest ?
We already had Giscardpunk, but how about De Gaulle the Techno-Priest ?
Funny timing to post this. Probably zero link with the recent breakthrough from EURatom and EUROfusion programs 🥸 🇪🇺
December 15, 2025 at 10:53 AM
Funny timing to post this. Probably zero link with the recent breakthrough from EURatom and EUROfusion programs 🥸 🇪🇺
My lab at @univbrest.bsky.social hitting headlines again!
A giant fishweir made of 62 monoliths and measuring 120x20m, has been discovered near Sein island (Brittany).
It's the largest underwater construction in France, and it was built by Mesolithic hunter gatherer 🤯
#PaleoSky #MegalithMonday🏺
A giant fishweir made of 62 monoliths and measuring 120x20m, has been discovered near Sein island (Brittany).
It's the largest underwater construction in France, and it was built by Mesolithic hunter gatherer 🤯
#PaleoSky #MegalithMonday🏺
December 15, 2025 at 9:12 AM
My lab at @univbrest.bsky.social hitting headlines again!
A giant fishweir made of 62 monoliths and measuring 120x20m, has been discovered near Sein island (Brittany).
It's the largest underwater construction in France, and it was built by Mesolithic hunter gatherer 🤯
#PaleoSky #MegalithMonday🏺
A giant fishweir made of 62 monoliths and measuring 120x20m, has been discovered near Sein island (Brittany).
It's the largest underwater construction in France, and it was built by Mesolithic hunter gatherer 🤯
#PaleoSky #MegalithMonday🏺
Reposted by Jean-François Cudennec
#MolluscMonday Another fossil in the galleries of the South Australia Museum, the heteromorph ammonite Tropaeum imperator, Collected from Early Cretaceous rocks at Coober Pedy, this is claimed to be the largest known ammonite from Australia with an uncoiled length of 3 metres.
December 15, 2025 at 6:27 AM
#MolluscMonday Another fossil in the galleries of the South Australia Museum, the heteromorph ammonite Tropaeum imperator, Collected from Early Cretaceous rocks at Coober Pedy, this is claimed to be the largest known ammonite from Australia with an uncoiled length of 3 metres.
Kees Scherer - Relief at a Ptolemaic Temple
Egypt, 1968 🏺
Egypt, 1968 🏺
December 14, 2025 at 3:23 PM
Kees Scherer - Relief at a Ptolemaic Temple
Egypt, 1968 🏺
Egypt, 1968 🏺
I know this is casual shitposting, but seen from Europe we might expect a little more from the « resistance ».
I used the Calibri font to send Marco Rubio a Christmas Card and signed as a Satan.
December 13, 2025 at 10:38 PM
I know this is casual shitposting, but seen from Europe we might expect a little more from the « resistance ».
Reposted by Jean-François Cudennec
Nerineids and bivalves on the floor of Bilkent Concert Hall, Ankara🥳
#UrbanGeology
#UrbanGeology
December 13, 2025 at 6:05 PM
Nerineids and bivalves on the floor of Bilkent Concert Hall, Ankara🥳
#UrbanGeology
#UrbanGeology
Amazing find !
But (and I don’t want to be too chauvinistic here) we have an older example in Brittany 🤓
Menez Dregan rock shelter in Finistère harbored several hearth dated back to 475ka (probably made H. heidelbergensis)
#PaleoSky 🏺⚒️
But (and I don’t want to be too chauvinistic here) we have an older example in Brittany 🤓
Menez Dregan rock shelter in Finistère harbored several hearth dated back to 475ka (probably made H. heidelbergensis)
#PaleoSky 🏺⚒️
December 13, 2025 at 9:43 PM
Amazing find !
But (and I don’t want to be too chauvinistic here) we have an older example in Brittany 🤓
Menez Dregan rock shelter in Finistère harbored several hearth dated back to 475ka (probably made H. heidelbergensis)
#PaleoSky 🏺⚒️
But (and I don’t want to be too chauvinistic here) we have an older example in Brittany 🤓
Menez Dregan rock shelter in Finistère harbored several hearth dated back to 475ka (probably made H. heidelbergensis)
#PaleoSky 🏺⚒️
Reposted by Jean-François Cudennec
This #FossilFriday it's one we found a couple of days ago but a perfect split to reveal this stunning calcite ammonite! Sadly not ideal tides to head out today to find bits but who knows what's lurking out there for next week!
December 12, 2025 at 11:07 AM
This #FossilFriday it's one we found a couple of days ago but a perfect split to reveal this stunning calcite ammonite! Sadly not ideal tides to head out today to find bits but who knows what's lurking out there for next week!
Wow
The award for the "Worst Statement Made By an Executive About Their Community" goes to...
MATT TURNER
Executive Producer at Xbox
For his ridiculous suggestion that laid-off gamedevs turn to ChatGPT for emotional support!
MATT TURNER
Executive Producer at Xbox
For his ridiculous suggestion that laid-off gamedevs turn to ChatGPT for emotional support!
December 12, 2025 at 8:56 AM
Wow
1/ Last week I attended to a conference entilted "Interactions between human societies and marine invertebrates" (I love how niche and obscure these meetings are), and I learned about the Neolithic desert kites, these huge traps in Middle East.
The link with marine inverts ? A quick thread ! 🦑🏺
The link with marine inverts ? A quick thread ! 🦑🏺
December 12, 2025 at 8:34 AM
It took the cat a millennium to reach Ireland from England
December 12, 2025 at 8:32 AM
It took the cat a millennium to reach Ireland from England
1/ Last week I attended to a conference entilted "Interactions between human societies and marine invertebrates" (I love how niche and obscure these meetings are), and I learned about the Neolithic desert kites, these huge traps in Middle East.
The link with marine inverts ? A quick thread ! 🦑🏺
The link with marine inverts ? A quick thread ! 🦑🏺
December 9, 2025 at 11:46 AM
1/ Last week I attended to a conference entilted "Interactions between human societies and marine invertebrates" (I love how niche and obscure these meetings are), and I learned about the Neolithic desert kites, these huge traps in Middle East.
The link with marine inverts ? A quick thread ! 🦑🏺
The link with marine inverts ? A quick thread ! 🦑🏺
Reposted by Jean-François Cudennec
1/ I don't know why but I'm weirdly attracted to shipwrecks maps.
I live in Brittany, so there's quite a few shipwreck around, too. Here's two examples from WWI and WWII only.
I live in Brittany, so there's quite a few shipwreck around, too. Here's two examples from WWI and WWII only.
November 26, 2025 at 2:12 PM
1/ I don't know why but I'm weirdly attracted to shipwrecks maps.
I live in Brittany, so there's quite a few shipwreck around, too. Here's two examples from WWI and WWII only.
I live in Brittany, so there's quite a few shipwreck around, too. Here's two examples from WWI and WWII only.