Nicolas Martin
@nclsmartin.bsky.social
480 followers 220 following 14 posts
Biological anthropologist | PhD candidate at PACEA (Univ. Bordeaux - France) Studying settlement processes in the Nile Valley (Late Pleistocene - Holocene) | Dental anthropology - Bony labyrinth morphology
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nclsmartin.bsky.social
🚨14.000 years of population history revealed!🚨

What happened to the late prehistoric populations in the Nile Valley?
Our new study uncovers major migrations, population replacement and regional mobility at the Neolithic transition!

1/7🧵 👇

www.pnas.org/doi/10.1073/...
Enamel–dentine junction morphology reveals population replacement and mobility in the late prehistoric Middle Nile Valley | PNAS
Transitions from foraging to food-production represent a worldwide turning point in recent human history. In the Middle Nile Valley this cultural s...
www.pnas.org
Reposted by Nicolas Martin
martamlahr.bsky.social
#ESHE2025
Super talk by @nclsmartin.bsky.social ‘Bony labyrinth morphology reveals 40,000 years of settlement history and population isolation in NE Africa’
Nile Valley: pop discontinuity in late Up Ple – endogamy?
AHP pop connectivity
Horn: also ~biol isolation, pathologies! huge variation
nclsmartin.bsky.social
Thrilled to be once again at #ESHE2025, this year in Paris! 🇫🇷
Tomorrow afternoon, I’ll be presenting our latest findings on the population history of Northeastern Africa 🌍 — with new data on continuity, isolation, and the inner ear. 👂
Stay tuned!
eshesociety.bsky.social
The #ESHE2025 meeting in Paris starts tomorrow (please use this hashtag for sharing). If you are interested in the program, you find it here mcusercontent.com/9347aa3598d5... - Members have received an email for accessing the live stream! We hope you all enjoy the conference in person or online. /MW
mcusercontent.com
Reposted by Nicolas Martin
isabellecrevecoeur.bsky.social
‼️📣Extremely proud to see this great collaborative work out!

Oldest Shell Ornament Workshop in Western Europe at Saint-Césaire: www.pnas.org/cgi/doi/10.1...

#Prehistory #Archaeology #Chatelperronian #Shells #Beads #Homosapiens #Neandertal #Ornament

Details of discovery & implications ⏬ 🧵 1/20
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
www.pnas.org
Reposted by Nicolas Martin
sapanthropologie.bsky.social
It is with deep sadness that the SAP announces the passing of Jaroslav Brůžek, Professor at the Faculty of Science of Charles University in Prague and Emeritus Research Director at the CNRS.

The scientific community has lost a pillar; the SAP has lost a dear friend.
Jaroslav Brůžek at the SAP conference
Reposted by Nicolas Martin
arevsumer.bsky.social
SAfA 2025 in Faro is starting in 2 days! I will be presenting our preliminary results from Hattab II Cave on Tuesday afternoon at session 43. Come see my presentation if you are interested in the possible late persistence of the Iberomaurusian at this site :) #AncientDNA
Reposted by Nicolas Martin
journalofanatomy.bsky.social
🦷 A common embryological, developmental, and genetic background is shared between dentine and cortical bone. @mathilde-augoyard.bsky.social and team found coordinated variation between their volumes in human limb bones and teeth, suggesting shared factors influencing their postnatal development 🦴
Reposted by Nicolas Martin
nclsmartin.bsky.social
🚨14.000 years of population history revealed!🚨

What happened to the late prehistoric populations in the Nile Valley?
Our new study uncovers major migrations, population replacement and regional mobility at the Neolithic transition!

1/7🧵 👇

www.pnas.org/doi/10.1073/...
Enamel–dentine junction morphology reveals population replacement and mobility in the late prehistoric Middle Nile Valley | PNAS
Transitions from foraging to food-production represent a worldwide turning point in recent human history. In the Middle Nile Valley this cultural s...
www.pnas.org
Reposted by Nicolas Martin
pnas.org
Read highlights in this week’s issue of PNAS: We uncover the prehistoric population history of the Middle Nile Valley, explore Pacific cupped oysters and hitchhiking invaders, and analyze how an antibody prevents fertilization at the egg-sperm interface. In PNAS: www.pnas.org/doi/10.1073/...
Pictured is a mustached monkey (Cercopithecus cephus) at ZooParc de Beauval, France. Rayhane Nchioua et al. investigated the origins of unusually high cytosine-phosphate-guanine (CpG) dinucleotide levels in simian immunodeficiency viruses found in mustached monkeys and mona monkeys (Cercopithecus mona).

CREDIT: ZooParc de Beauval.
Reposted by Nicolas Martin
pnas.org
A look at the enamel–dentine junctions of the teeth of ancient Egyptians suggests that foraging people were replaced by farmers during the 6th millennium BCE, rather than taking up farming themselves. Some foragers persisted in Sudan. In PNAS: www.pnas.org/doi/10.1073/...
Enamel–dentine junctions of late prehistoric individuals from the Nile Valley. 

CREDIT: Nicolas Martin
Reposted by Nicolas Martin
mpi-eva-leipzig.bsky.social
Ancient genomes from the Green #Sahara. Study led by @nadasalem.bsky.social, @hringbauer.bsky.social & Johannes Krause reveals a long-isolated North African human lineage in the Central Sahara during the African Humid Period over 7,000 years ago. tinyurl.com/43maxc7k & www.nature.com/articles/s41...
Reposted by Nicolas Martin
cnrsecologie.bsky.social
#RésultatScientifique🔎
Une étude menée par le laboratoire PACEA révèle des découvertes inédites sur le peuplement de l'Égypte et du Soudan, grâce à l'analyse de dents humaines vieilles de 4 000 à 18 000 ans.
▶️ www.inee.cnrs.fr/fr/cnrsinfo/...
nclsmartin.bsky.social
This work results from a long-term collaboration of researchers from international institutions and support by the local authorities.

Thanks so much to all co-authors, including @isabellecrevecoeur.bsky.social, @clement-zanolli.bsky.social, @fredericsantos.bsky.social !
nclsmartin.bsky.social
We also discovered evidence of mobility along the Wadi Howar river during the Neolithic period: some individuals from the desert show a "Nilotic-like" signal, while individuals from the Southern Dongola Reach (along the Nile) show a forager/desert-like ancestry - suggesting regional exchanges.🚶‍♂️🚶‍♀️
5/7
Map showing the location of the mid-Holocene samples included and their respective population (colors) and cultural affinities (dashed lines). Mobility and interactions along the Wadi Howar
nclsmartin.bsky.social
Interestingly, while the new food-producing population replaced the previous hunter-gatherers along the Nile, we identified a forager-related population in the Eastern Sahara.

This suggests that Neolithic newcomers did not extend further into the desert margins and settled along the Nile only.
4/7
Schematic synthesis of the settlement processes and population history of the Nile Valley from the Late Pleistocene to mid-Holocene
nclsmartin.bsky.social
We found significant morphological differences between the last foragers and first food-producers in the region.
Considering the extremely high phylogenetic signal of the EDJ, this provides clear evidence of biological discontinuity and migration towards the valley at the Neolithic transition 🔄
3/7
Schematic representation of the chronological variation in the morphology of the enamel-dentine junction (UM1)
nclsmartin.bsky.social
We analyzed the enamel-dentine junction (EDJ) -a highly reliable proxy for population affinities- of 88 individuals from Late Pleistocene to mid-Holocene sites in Sudan and Southern Egypt. We focused on the first and second upper molars of these individuals. 🦷

2/7
Digitization of a first upper molar (Left) and views of the enamel dentine junction of two individuals (Right)
nclsmartin.bsky.social
🚨14.000 years of population history revealed!🚨

What happened to the late prehistoric populations in the Nile Valley?
Our new study uncovers major migrations, population replacement and regional mobility at the Neolithic transition!

1/7🧵 👇

www.pnas.org/doi/10.1073/...
Enamel–dentine junction morphology reveals population replacement and mobility in the late prehistoric Middle Nile Valley | PNAS
Transitions from foraging to food-production represent a worldwide turning point in recent human history. In the Middle Nile Valley this cultural s...
www.pnas.org
Reposted by Nicolas Martin
sntipper.bsky.social
Are you a PGR or ECR working on research to do with Sudan, South Sudan or Egypt?

The Sudan Studies Research conference cfp is open for abstract submissions!

Deadline is the 31st March

www.sudan-conference.com

#sudan #southsudan #egypt #law #policy #education #science #heritage #archaeology
Cfp for Sudan studies conference