Şahin ÇAKIR
@sahincakir70414.bsky.social
Independent theoretical scientist and geologist
Why did these extremely large teeth arise in extreme climatic warmings?
Obi-Rakhmat 1 #Neanderthal
Denisova 8 and 4 #Denisovan
Qafzeh 9 #Sapiens
NEW evidence for #DNA -driven #ProgRetrogProg Evolution of #Sapiens
#FossilFriday #Paleoanthropology #ancientDNA
Obi-Rakhmat 1 #Neanderthal
Denisova 8 and 4 #Denisovan
Qafzeh 9 #Sapiens
NEW evidence for #DNA -driven #ProgRetrogProg Evolution of #Sapiens
#FossilFriday #Paleoanthropology #ancientDNA
November 9, 2025 at 6:16 AM
Why did these extremely large teeth arise in extreme climatic warmings?
Obi-Rakhmat 1 #Neanderthal
Denisova 8 and 4 #Denisovan
Qafzeh 9 #Sapiens
NEW evidence for #DNA -driven #ProgRetrogProg Evolution of #Sapiens
#FossilFriday #Paleoanthropology #ancientDNA
Obi-Rakhmat 1 #Neanderthal
Denisova 8 and 4 #Denisovan
Qafzeh 9 #Sapiens
NEW evidence for #DNA -driven #ProgRetrogProg Evolution of #Sapiens
#FossilFriday #Paleoanthropology #ancientDNA
Denisova 25 PSEUDO #Denisovan molar ~200 ka
Denisova 8 REAL #Denisovan molar ~120 ka
The discrepancies below support that
they went extinct ~140 ka ago and
REAL #Denisovans & #Neanderthals originated from the macroevolution:
doi.org/10.31219/osf...
#FossilFriday #Paleoanthropology #ancientDNA
Denisova 8 REAL #Denisovan molar ~120 ka
The discrepancies below support that
they went extinct ~140 ka ago and
REAL #Denisovans & #Neanderthals originated from the macroevolution:
doi.org/10.31219/osf...
#FossilFriday #Paleoanthropology #ancientDNA
November 9, 2025 at 6:10 AM
Denisova 25 PSEUDO #Denisovan molar ~200 ka
Denisova 8 REAL #Denisovan molar ~120 ka
The discrepancies below support that
they went extinct ~140 ka ago and
REAL #Denisovans & #Neanderthals originated from the macroevolution:
doi.org/10.31219/osf...
#FossilFriday #Paleoanthropology #ancientDNA
Denisova 8 REAL #Denisovan molar ~120 ka
The discrepancies below support that
they went extinct ~140 ka ago and
REAL #Denisovans & #Neanderthals originated from the macroevolution:
doi.org/10.31219/osf...
#FossilFriday #Paleoanthropology #ancientDNA
Yunxian 2 and Harbin, China
#FossilFriday #Paleoanthropology #mtDNA
NOT #Denisovan in NEW PARADIGM:
doi.org/10.31219/osf...
#FossilFriday #Paleoanthropology #mtDNA
NOT #Denisovan in NEW PARADIGM:
doi.org/10.31219/osf...
October 3, 2025 at 3:19 PM
Yunxian 2 and Harbin, China
#FossilFriday #Paleoanthropology #mtDNA
NOT #Denisovan in NEW PARADIGM:
doi.org/10.31219/osf...
#FossilFriday #Paleoanthropology #mtDNA
NOT #Denisovan in NEW PARADIGM:
doi.org/10.31219/osf...
Mezmaiskaya 1 #Neanderthal infant burial, Russia, ~65 ka
Border Cave 3 (BC3) infant burial, S. Africa, ~74 ka
#Paleoanthropology #Archaeology #FossilFriday
Border Cave 3 (BC3) infant burial, S. Africa, ~74 ka
#Paleoanthropology #Archaeology #FossilFriday
August 22, 2025 at 2:41 PM
Mezmaiskaya 1 #Neanderthal infant burial, Russia, ~65 ka
Border Cave 3 (BC3) infant burial, S. Africa, ~74 ka
#Paleoanthropology #Archaeology #FossilFriday
Border Cave 3 (BC3) infant burial, S. Africa, ~74 ka
#Paleoanthropology #Archaeology #FossilFriday
#FossilFriday
Liang Bua 1, most likely one of #Sapiens' retrogressive forms
>72 000 y (Grün & Stringer 2023)
MALE, not female (Jacob et al. 2006)
"the clear sexing of the LB1 cranium and mandible indicates that the individual is male"
pmc.ncbi.nlm.nih.gov/articles/ins...
Liang Bua 1, most likely one of #Sapiens' retrogressive forms
>72 000 y (Grün & Stringer 2023)
MALE, not female (Jacob et al. 2006)
"the clear sexing of the LB1 cranium and mandible indicates that the individual is male"
pmc.ncbi.nlm.nih.gov/articles/ins...
August 9, 2025 at 9:32 AM
#FossilFriday
Liang Bua 1, most likely one of #Sapiens' retrogressive forms
>72 000 y (Grün & Stringer 2023)
MALE, not female (Jacob et al. 2006)
"the clear sexing of the LB1 cranium and mandible indicates that the individual is male"
pmc.ncbi.nlm.nih.gov/articles/ins...
Liang Bua 1, most likely one of #Sapiens' retrogressive forms
>72 000 y (Grün & Stringer 2023)
MALE, not female (Jacob et al. 2006)
"the clear sexing of the LB1 cranium and mandible indicates that the individual is male"
pmc.ncbi.nlm.nih.gov/articles/ins...
#FossilFriday Skhul 9 burial, male or female?
Oldest-known early #Neanderthal early #Denisovan and early #Sapiens in NEW PARADIGM:
dx.doi.org/10.31219/osf...
#Paleoanthropology #ancientDNA
Oldest-known early #Neanderthal early #Denisovan and early #Sapiens in NEW PARADIGM:
dx.doi.org/10.31219/osf...
#Paleoanthropology #ancientDNA
July 26, 2025 at 2:12 PM
#FossilFriday Skhul 9 burial, male or female?
Oldest-known early #Neanderthal early #Denisovan and early #Sapiens in NEW PARADIGM:
dx.doi.org/10.31219/osf...
#Paleoanthropology #ancientDNA
Oldest-known early #Neanderthal early #Denisovan and early #Sapiens in NEW PARADIGM:
dx.doi.org/10.31219/osf...
#Paleoanthropology #ancientDNA
#FossilFriday
La Naulette #Neanderthal mandible and
#Sapiens-like ulna & metacarpal, Belgium
Evidence for #DNA - driven POSITIVE EVOLUTION due to extreme warming in MIS 5e
dx.doi.org/10.31219/osf...
La Naulette #Neanderthal mandible and
#Sapiens-like ulna & metacarpal, Belgium
Evidence for #DNA - driven POSITIVE EVOLUTION due to extreme warming in MIS 5e
dx.doi.org/10.31219/osf...
July 19, 2025 at 1:35 PM
#FossilFriday
La Naulette #Neanderthal mandible and
#Sapiens-like ulna & metacarpal, Belgium
Evidence for #DNA - driven POSITIVE EVOLUTION due to extreme warming in MIS 5e
dx.doi.org/10.31219/osf...
La Naulette #Neanderthal mandible and
#Sapiens-like ulna & metacarpal, Belgium
Evidence for #DNA - driven POSITIVE EVOLUTION due to extreme warming in MIS 5e
dx.doi.org/10.31219/osf...
#FossilFriday
Evidence for #DNA- driven NEGATIVE EVOLUTION due to sudden cooling at ~129 ka.
Ngaloba #Sapiens, Krapina 6 #Neanderthal, Omo 2
New estimation for Omo 1: ~125 ka old, neither ~195 nor ~233 ka
dx.doi.org/10.31219/osf...
Evidence for #DNA- driven NEGATIVE EVOLUTION due to sudden cooling at ~129 ka.
Ngaloba #Sapiens, Krapina 6 #Neanderthal, Omo 2
New estimation for Omo 1: ~125 ka old, neither ~195 nor ~233 ka
dx.doi.org/10.31219/osf...
July 19, 2025 at 12:55 PM
#FossilFriday
Evidence for #DNA- driven NEGATIVE EVOLUTION due to sudden cooling at ~129 ka.
Ngaloba #Sapiens, Krapina 6 #Neanderthal, Omo 2
New estimation for Omo 1: ~125 ka old, neither ~195 nor ~233 ka
dx.doi.org/10.31219/osf...
Evidence for #DNA- driven NEGATIVE EVOLUTION due to sudden cooling at ~129 ka.
Ngaloba #Sapiens, Krapina 6 #Neanderthal, Omo 2
New estimation for Omo 1: ~125 ka old, neither ~195 nor ~233 ka
dx.doi.org/10.31219/osf...
#FossilFriday
Divided mid-trigonid crests at Sima de los Huesos and Suard
confirm that PSEUDO #Neanderthals went extinct ~140 kya
NEW EVIDENCE for the Levantine #macroevolution ~140 kya
dx.doi.org/10.31219/osf...
#Paleoanthropology
Divided mid-trigonid crests at Sima de los Huesos and Suard
confirm that PSEUDO #Neanderthals went extinct ~140 kya
NEW EVIDENCE for the Levantine #macroevolution ~140 kya
dx.doi.org/10.31219/osf...
#Paleoanthropology
July 18, 2025 at 1:40 PM
#FossilFriday
Divided mid-trigonid crests at Sima de los Huesos and Suard
confirm that PSEUDO #Neanderthals went extinct ~140 kya
NEW EVIDENCE for the Levantine #macroevolution ~140 kya
dx.doi.org/10.31219/osf...
#Paleoanthropology
Divided mid-trigonid crests at Sima de los Huesos and Suard
confirm that PSEUDO #Neanderthals went extinct ~140 kya
NEW EVIDENCE for the Levantine #macroevolution ~140 kya
dx.doi.org/10.31219/osf...
#Paleoanthropology
July 5, 2025 at 7:38 AM
#FossilFriday Harbin, PSEUDO-Denisovan, China
"the Harbin cranium, northeastern China, is both pre-140 ka (minimum 146 ka) and lacking suprainiac fossa (Ni et al., 2021) therefore, is NOT Denisovan in New Paradigm"
dx.doi.org/10.31219/osf...
#Paleoanthropology #ancientDNA #Homolongi
"the Harbin cranium, northeastern China, is both pre-140 ka (minimum 146 ka) and lacking suprainiac fossa (Ni et al., 2021) therefore, is NOT Denisovan in New Paradigm"
dx.doi.org/10.31219/osf...
#Paleoanthropology #ancientDNA #Homolongi
June 28, 2025 at 5:04 PM
#FossilFriday Harbin, PSEUDO-Denisovan, China
"the Harbin cranium, northeastern China, is both pre-140 ka (minimum 146 ka) and lacking suprainiac fossa (Ni et al., 2021) therefore, is NOT Denisovan in New Paradigm"
dx.doi.org/10.31219/osf...
#Paleoanthropology #ancientDNA #Homolongi
"the Harbin cranium, northeastern China, is both pre-140 ka (minimum 146 ka) and lacking suprainiac fossa (Ni et al., 2021) therefore, is NOT Denisovan in New Paradigm"
dx.doi.org/10.31219/osf...
#Paleoanthropology #ancientDNA #Homolongi
#FossilFriday Ranis, Oase 1, Ust'-Ishim, Tianyuan #Sapiens
Wrong Paradigm (African origin of modern humans) leads to wrong inferences.
ALTERNATIVE PARADIGM: Homo sapiens' DNA-driven birth and ProgRetrogProg evolution
dx.doi.org/10.31219/osf...
Wrong Paradigm (African origin of modern humans) leads to wrong inferences.
ALTERNATIVE PARADIGM: Homo sapiens' DNA-driven birth and ProgRetrogProg evolution
dx.doi.org/10.31219/osf...
May 17, 2025 at 10:42 AM
#FossilFriday Ranis, Oase 1, Ust'-Ishim, Tianyuan #Sapiens
Wrong Paradigm (African origin of modern humans) leads to wrong inferences.
ALTERNATIVE PARADIGM: Homo sapiens' DNA-driven birth and ProgRetrogProg evolution
dx.doi.org/10.31219/osf...
Wrong Paradigm (African origin of modern humans) leads to wrong inferences.
ALTERNATIVE PARADIGM: Homo sapiens' DNA-driven birth and ProgRetrogProg evolution
dx.doi.org/10.31219/osf...
#FossilFriday
Nomenclature mess on the Dmanisi sample: NOT #Erectus
doi.org/10.1101/2025...
?New Evidence for DNA-driven ProgRetrogProg evolution?
Nomenclature mess on the Dmanisi sample: NOT #Erectus
doi.org/10.1101/2025...
?New Evidence for DNA-driven ProgRetrogProg evolution?
May 11, 2025 at 3:51 PM
#FossilFriday
Nomenclature mess on the Dmanisi sample: NOT #Erectus
doi.org/10.1101/2025...
?New Evidence for DNA-driven ProgRetrogProg evolution?
Nomenclature mess on the Dmanisi sample: NOT #Erectus
doi.org/10.1101/2025...
?New Evidence for DNA-driven ProgRetrogProg evolution?
#FossilFriday ProgRetrogProg human evolution
Inverted-T-like chins seen in Qafzeh 11, Qafzeh 9, and KRM 41815 correspond to the extreme warming MIS 5e (~120 000 y)
Inverted-T-like chin reappears in Border Cave 2 ~81 000 y ago (another extreme warming)
#Paleoanthropology
dx.doi.org/10.31219/osf...
Inverted-T-like chins seen in Qafzeh 11, Qafzeh 9, and KRM 41815 correspond to the extreme warming MIS 5e (~120 000 y)
Inverted-T-like chin reappears in Border Cave 2 ~81 000 y ago (another extreme warming)
#Paleoanthropology
dx.doi.org/10.31219/osf...
April 25, 2025 at 5:14 PM
#FossilFriday ProgRetrogProg human evolution
Inverted-T-like chins seen in Qafzeh 11, Qafzeh 9, and KRM 41815 correspond to the extreme warming MIS 5e (~120 000 y)
Inverted-T-like chin reappears in Border Cave 2 ~81 000 y ago (another extreme warming)
#Paleoanthropology
dx.doi.org/10.31219/osf...
Inverted-T-like chins seen in Qafzeh 11, Qafzeh 9, and KRM 41815 correspond to the extreme warming MIS 5e (~120 000 y)
Inverted-T-like chin reappears in Border Cave 2 ~81 000 y ago (another extreme warming)
#Paleoanthropology
dx.doi.org/10.31219/osf...
"its origin remains unclear"
#Denisovans were East Asian #Neanderthals in New Paradigm: dx.doi.org/10.31219/osf...
Thus, the same lithic technology in East Asia, ~55 000 y ago
doi.org/10.1073/pnas...
#Denisovans were East Asian #Neanderthals in New Paradigm: dx.doi.org/10.31219/osf...
Thus, the same lithic technology in East Asia, ~55 000 y ago
doi.org/10.1073/pnas...
April 1, 2025 at 3:47 PM
"its origin remains unclear"
#Denisovans were East Asian #Neanderthals in New Paradigm: dx.doi.org/10.31219/osf...
Thus, the same lithic technology in East Asia, ~55 000 y ago
doi.org/10.1073/pnas...
#Denisovans were East Asian #Neanderthals in New Paradigm: dx.doi.org/10.31219/osf...
Thus, the same lithic technology in East Asia, ~55 000 y ago
doi.org/10.1073/pnas...
#FossilFriday
NEW PARADIGM for #Sapiens #Neanderthals #Denisovans #Floresiensis #Naledi #DNA
dx.doi.org/10.31219/osf...
NEW PARADIGM for #Sapiens #Neanderthals #Denisovans #Floresiensis #Naledi #DNA
dx.doi.org/10.31219/osf...
March 29, 2025 at 2:29 AM
#FossilFriday
Skhul 9, Israel, “perhaps around 140 ka” (Grün et al., 2005)
Oldest-known #Sapiens and also an initial #Neanderthal in NEW PARADIGM:
Homo sapiens' DNA-driven birth and ProgRetrogProg evolution
osf.io/preprints/os...
Skhul 9, Israel, “perhaps around 140 ka” (Grün et al., 2005)
Oldest-known #Sapiens and also an initial #Neanderthal in NEW PARADIGM:
Homo sapiens' DNA-driven birth and ProgRetrogProg evolution
osf.io/preprints/os...
March 22, 2025 at 8:36 AM
#FossilFriday
Skhul 9, Israel, “perhaps around 140 ka” (Grün et al., 2005)
Oldest-known #Sapiens and also an initial #Neanderthal in NEW PARADIGM:
Homo sapiens' DNA-driven birth and ProgRetrogProg evolution
osf.io/preprints/os...
Skhul 9, Israel, “perhaps around 140 ka” (Grün et al., 2005)
Oldest-known #Sapiens and also an initial #Neanderthal in NEW PARADIGM:
Homo sapiens' DNA-driven birth and ProgRetrogProg evolution
osf.io/preprints/os...
~100 ka versus ~7 ka
UNRESTRICTED GENE FLOW from ~140 to ~40 ka
dx.doi.org/10.31219/osf...
OR
RESTRICTED GENE FLOW between ~50 and ~43 ka?
Iasi et al. (2024): " #Neanderthal gene flow into the common ancestors of all non-Africans that occurred between 50,500 and 43,500 years ago"
#Paleogenetics
UNRESTRICTED GENE FLOW from ~140 to ~40 ka
dx.doi.org/10.31219/osf...
OR
RESTRICTED GENE FLOW between ~50 and ~43 ka?
Iasi et al. (2024): " #Neanderthal gene flow into the common ancestors of all non-Africans that occurred between 50,500 and 43,500 years ago"
#Paleogenetics
December 14, 2024 at 9:22 AM
~100 ka versus ~7 ka
UNRESTRICTED GENE FLOW from ~140 to ~40 ka
dx.doi.org/10.31219/osf...
OR
RESTRICTED GENE FLOW between ~50 and ~43 ka?
Iasi et al. (2024): " #Neanderthal gene flow into the common ancestors of all non-Africans that occurred between 50,500 and 43,500 years ago"
#Paleogenetics
UNRESTRICTED GENE FLOW from ~140 to ~40 ka
dx.doi.org/10.31219/osf...
OR
RESTRICTED GENE FLOW between ~50 and ~43 ka?
Iasi et al. (2024): " #Neanderthal gene flow into the common ancestors of all non-Africans that occurred between 50,500 and 43,500 years ago"
#Paleogenetics
#Geology #Earth #GeoPhysics
The mysterious, massive structures in Earth’s deep mantle
doi.org/10.1063/pt.m...
The mysterious, massive structures in Earth’s deep mantle
doi.org/10.1063/pt.m...
The mysterious, massive structures in Earth’s deep mantle
Seismic waves traversing the interior of the planet reveal continent-sized regions with distinct physical properties. Researchers are investigating what they ar
doi.org
December 11, 2024 at 4:04 PM
#Geology #Earth #GeoPhysics
The mysterious, massive structures in Earth’s deep mantle
doi.org/10.1063/pt.m...
The mysterious, massive structures in Earth’s deep mantle
doi.org/10.1063/pt.m...
Border Cave 1 and 2
Sapiens skull and mandible,
South Africa
~81,000 years (Millard 2008)
with an almost inverted-T-like chin
EVIDENCE for DNA-driven progression induced by extreme warming
Sapiens skull and mandible,
South Africa
~81,000 years (Millard 2008)
with an almost inverted-T-like chin
EVIDENCE for DNA-driven progression induced by extreme warming
November 18, 2024 at 4:29 PM
Border Cave 1 and 2
Sapiens skull and mandible,
South Africa
~81,000 years (Millard 2008)
with an almost inverted-T-like chin
EVIDENCE for DNA-driven progression induced by extreme warming
Sapiens skull and mandible,
South Africa
~81,000 years (Millard 2008)
with an almost inverted-T-like chin
EVIDENCE for DNA-driven progression induced by extreme warming