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
Knowing that the earliest form of art in human and pre-human history could be an Indonesian shell that some Homo erectus dude engraved with zigzags 500,000 years ago definitely satisfies the shell nerd in me.
#FossilFriday #PaleoSky 🏺 🦑
#FossilFriday #PaleoSky 🏺 🦑
February 2, 2026 at 11:47 AM
Reposted by Jean-François Cudennec
Sclerochronology in the @cnrs.fr journal !
Read about the work of our colleagues Laurent Chauvaud, Julien Thébault and Erwan Amice, and the use of bivalves as invaluable archives of the environment and climate.
news.cnrs.fr/articles/she...
🌊🧪🦑🌍
Read about the work of our colleagues Laurent Chauvaud, Julien Thébault and Erwan Amice, and the use of bivalves as invaluable archives of the environment and climate.
news.cnrs.fr/articles/she...
🌊🧪🦑🌍
Shells, the Sentinels of the Ocean
Pollution, water temperature, oxygen levels... Scallops and other bivalves represent invaluable archives of the environment and climate. Researchers from Brittany, who were behind this discovery, have...
news.cnrs.fr
January 30, 2026 at 8:55 AM
Sclerochronology in the @cnrs.fr journal !
Read about the work of our colleagues Laurent Chauvaud, Julien Thébault and Erwan Amice, and the use of bivalves as invaluable archives of the environment and climate.
news.cnrs.fr/articles/she...
🌊🧪🦑🌍
Read about the work of our colleagues Laurent Chauvaud, Julien Thébault and Erwan Amice, and the use of bivalves as invaluable archives of the environment and climate.
news.cnrs.fr/articles/she...
🌊🧪🦑🌍
Reposted by Jean-François Cudennec
More added 🦕🦖
👇 The list is growing 🌿
February 1, 2026 at 2:49 PM
More added 🦕🦖
2/2 The interesting thing here is that these shells comes from a late Neolithic shell midden (2,200 BC), and their shape tells us about the different exploited shore zones. Smaller + flatter shells can even highlight overexploitation events, as people had to go farther down the shore.
February 2, 2026 at 8:43 AM
2/2 The interesting thing here is that these shells comes from a late Neolithic shell midden (2,200 BC), and their shape tells us about the different exploited shore zones. Smaller + flatter shells can even highlight overexploitation events, as people had to go farther down the shore.
1/2 Two different limpet shells, belonging to the same species (P. vulgata).
The flat one comes from low shore (large foot + reduced shell surface to resist strong waves and currents) while the pointed one comes from high shore (ribs + high shell help resist dessication by creating shadowed area)
The flat one comes from low shore (large foot + reduced shell surface to resist strong waves and currents) while the pointed one comes from high shore (ribs + high shell help resist dessication by creating shadowed area)
February 2, 2026 at 8:43 AM
1/2 Two different limpet shells, belonging to the same species (P. vulgata).
The flat one comes from low shore (large foot + reduced shell surface to resist strong waves and currents) while the pointed one comes from high shore (ribs + high shell help resist dessication by creating shadowed area)
The flat one comes from low shore (large foot + reduced shell surface to resist strong waves and currents) while the pointed one comes from high shore (ribs + high shell help resist dessication by creating shadowed area)
Anthropocene stray dogs
January 31, 2026 at 7:41 PM
Anthropocene stray dogs
Agricultural policy or performance art ?
In 1978 in Finistère (my home 💙), President Giscard d’Estaing’s visit was disrupted by farmers who tagged his helicopter and hung a dead pig from its blade.
The impact on farmers’ lives remains unclear, but the protest left an iconic image.
In 1978 in Finistère (my home 💙), President Giscard d’Estaing’s visit was disrupted by farmers who tagged his helicopter and hung a dead pig from its blade.
The impact on farmers’ lives remains unclear, but the protest left an iconic image.
January 30, 2026 at 11:49 AM
Agricultural policy or performance art ?
In 1978 in Finistère (my home 💙), President Giscard d’Estaing’s visit was disrupted by farmers who tagged his helicopter and hung a dead pig from its blade.
The impact on farmers’ lives remains unclear, but the protest left an iconic image.
In 1978 in Finistère (my home 💙), President Giscard d’Estaing’s visit was disrupted by farmers who tagged his helicopter and hung a dead pig from its blade.
The impact on farmers’ lives remains unclear, but the protest left an iconic image.
Sclerochronology in the @cnrs.fr journal !
Read about the work of our colleagues Laurent Chauvaud, Julien Thébault and Erwan Amice, and the use of bivalves as invaluable archives of the environment and climate.
news.cnrs.fr/articles/she...
🌊🧪🦑🌍
Read about the work of our colleagues Laurent Chauvaud, Julien Thébault and Erwan Amice, and the use of bivalves as invaluable archives of the environment and climate.
news.cnrs.fr/articles/she...
🌊🧪🦑🌍
Shells, the Sentinels of the Ocean
Pollution, water temperature, oxygen levels... Scallops and other bivalves represent invaluable archives of the environment and climate. Researchers from Brittany, who were behind this discovery, have...
news.cnrs.fr
January 30, 2026 at 8:55 AM
Sclerochronology in the @cnrs.fr journal !
Read about the work of our colleagues Laurent Chauvaud, Julien Thébault and Erwan Amice, and the use of bivalves as invaluable archives of the environment and climate.
news.cnrs.fr/articles/she...
🌊🧪🦑🌍
Read about the work of our colleagues Laurent Chauvaud, Julien Thébault and Erwan Amice, and the use of bivalves as invaluable archives of the environment and climate.
news.cnrs.fr/articles/she...
🌊🧪🦑🌍
My favorite winter activity : binge watch aquascaping videos
January 16, 2026 at 1:29 PM
My favorite winter activity : binge watch aquascaping videos
Knowing that the earliest form of art in human and pre-human history could be an Indonesian shell that some Homo erectus dude engraved with zigzags 500,000 years ago definitely satisfies the shell nerd in me.
#FossilFriday #PaleoSky 🏺 🦑
#FossilFriday #PaleoSky 🏺 🦑
January 16, 2026 at 8:48 AM
Knowing that the earliest form of art in human and pre-human history could be an Indonesian shell that some Homo erectus dude engraved with zigzags 500,000 years ago definitely satisfies the shell nerd in me.
#FossilFriday #PaleoSky 🏺 🦑
#FossilFriday #PaleoSky 🏺 🦑
Map of Viking settlements and outposts in Iceland, Greenland and North America - 1010 AD.
For scientific interest only, an absolutely not linked with current international situation ❄️
For scientific interest only, an absolutely not linked with current international situation ❄️
January 16, 2026 at 8:26 AM
Map of Viking settlements and outposts in Iceland, Greenland and North America - 1010 AD.
For scientific interest only, an absolutely not linked with current international situation ❄️
For scientific interest only, an absolutely not linked with current international situation ❄️
Reposted by Jean-François Cudennec
I’ve created a starter pack for #zooarchaeology and #biomolecular archaeology for all periods. Let me know if you want to be added go.bsky.app/Nv8XE4r 🦣🧪🏺🦴🦷
December 1, 2024 at 11:25 AM
I’ve created a starter pack for #zooarchaeology and #biomolecular archaeology for all periods. Let me know if you want to be added go.bsky.app/Nv8XE4r 🦣🧪🏺🦴🦷
Reposted by Jean-François Cudennec
Why does life explore so few of the forms it could possibly take? Using fractal descriptors, this #scienceadvances paper shows that Earth’s biosphere clusters around simple shapes, reflecting deep evolutionary constraints. @artemyte.bsky.social @manlius.bsky.social www.science.org/doi/pdf/10.1...
January 11, 2026 at 1:23 PM
Why does life explore so few of the forms it could possibly take? Using fractal descriptors, this #scienceadvances paper shows that Earth’s biosphere clusters around simple shapes, reflecting deep evolutionary constraints. @artemyte.bsky.social @manlius.bsky.social www.science.org/doi/pdf/10.1...
🏺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
Not right now, but the work was conducted by Isabelle Rouget from the Paris Museum, if that helps
December 21, 2025 at 5:26 PM
Not right now, but the work was conducted by Isabelle Rouget from the Paris Museum, if that helps
🪶 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 ! ❄️🌞
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/...
D'ailleurs la profondeur à laquelle les carbonates sont complètement dissous (CCD : carbonate compensation depth) varie en fonction des caractéristiques de chaque bassin océanique.
Mais avec le réchauffement et l'acidification des océans, elle à partout tendance à remonter dangereusement...
Mais avec le réchauffement et l'acidification des océans, elle à partout tendance à remonter dangereusement...
December 16, 2025 at 1:47 PM
D'ailleurs la profondeur à laquelle les carbonates sont complètement dissous (CCD : carbonate compensation depth) varie en fonction des caractéristiques de chaque bassin océanique.
Mais avec le réchauffement et l'acidification des océans, elle à partout tendance à remonter dangereusement...
Mais avec le réchauffement et l'acidification des océans, elle à partout tendance à remonter dangereusement...
🏺 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 ?