Results 61 to 70 of about 2,719,722 (227)

The 9+ month marathon: How pregnancy may have shaped human endurance capacities

The Anatomical Record, EarlyView.
Abstract Anthropology has long considered the evolution of our uniquely human endurance capacities to be the result of selection upon anatomical and physiological features imposed by the demands of thermoregulation and resource acquisition, particularly during the demands of persistence hunting. Research has focused on the anatomical changes present in
Cara Ocobock
wiley   +1 more source

Earliest Olduvai hominins exploited unstable environments ~ 2 million years ago

Nature Communications, 2021
Oldupai Gorge, Tanzania is a key site for understanding early human evolution. Here, the authors report a multiproxy dataset from the Western basin of Oldupai Gorge dating to 2 million years ago, enabling the in situ comparison of lithic assemblages ...
Julio Mercader, Pam Akuku, Nicole Boivin, Revocatus Bugumba, Pastory Bushozi, Alfredo Camacho, Tristan Carter, Siobhán Clarke, Arturo Cueva-Temprana, Paul Durkin, Julien Favreau, Kelvin Fella, Simon Haberle, Stephen Hubbard, Jamie Inwood, Makarius Itambu, Samson Koromo, Patrick Lee, Abdallah Mohammed, Aloyce Mwambwiga, Lucas Olesilau, Robert Patalano, Patrick Roberts, Susan Rule, Palmira Saladie, Gunnar Siljedal, María Soto, Jonathan Umbsaar, Michael Petraglia   +28 more
doaj   +1 more source

The fossil record stays silent: Confusions and conundrums for hominin pelvis evolution

The Anatomical Record, EarlyView.
Abstract The evolution of the hominin pelvis is commonly modeled as a series of stages driven largely by the requirements of bipedal locomotion, reproduction, thermoregulation, and pelvic floor muscular support. These patterns are complicated by variation in canal dimensions in relationship with different changes in overall pelvic breadths. To quantify
Helen K. Kurki, Cara M. Wall‐Scheffler
wiley   +1 more source

Reconstructing cranial evolution in an extinct hominin

Proceedings of the Royal Society B: Biological Sciences, 2021
Homo erectusis the first hominin species with a truly cosmopolitan distribution and resembles recent humans in its broad spatial distribution. The microevolutionary events associated with dispersal and local adaptation may have produced similar population structure in both species. Understanding the evolutionary population dynamics ofH.
openaire   +3 more sources

The mechanism of labor in nonhuman primates: A look inside

The Anatomical Record, EarlyView.
Abstract While in humans, the flexed position of the fetus and its rotating course down the birth canal are well documented, in other primates the mechanism of labor is unknown. Despite the lack of comparative data, it is commonly assumed that the human obstetric mechanism is unique, and anthropologists have disputed when and why the transition to the ...
Melissa K. Stoller
wiley   +1 more source

Long-term behavioral adaptation of Oldowan toolmakers to resource-constrained environments at 2.3 Ma in the Lower Omo Valley (Ethiopia)

Scientific Reports, 2023
The long stratigraphic sequence of the Shungura Formation in the Lower Omo Valley documents 3 million years (Ma) of hominin evolution, which, when combined with detailed paleo-depositional environmental data, opens new perspectives for understanding the ...
Anne Delagnes, Aline Galland, Brad Gravina, Pascal Bertran, Marion Corbé, Michel Brenet, Haregwin Belete Hailu, Fikeru Mekonenn Sissay, Bisrat Gebreegziabher Araya, Misganaw Gebremichael Woldetsadik, Jean-Renaud Boisserie   +10 more
doaj   +1 more source

Historical birth records from 1896 to 1944 from the Basel maternity hospital, Switzerland, reveal significant obstetric selection pressures

The Anatomical Record, EarlyView.
Abstract Maternal and neonatal morbidity and mortality have declined dramatically during the last century. Historical data are therefore important sources to study the evolutionary selection pressures related to childbirth and how they have fluctuated over time.
Mirella Woodert, Guillermo Bravo Morante, Viktoria A. Krenn, Cédric Cordey, Nicole Torres‐Tamayo, Kaspar Staub, Nicole M. Webb, Martin Haeusler   +7 more
wiley   +1 more source

Deep Time in Perspective: An Animated Fossil Hominin Timeline

PaleoAnthropology, 2011
The lapse of deep, geologic time—a concept that Darwin struggled to explain to readers of Origin of Species—is all but ignored in paper representations of hominin evolution.
Holly M. Dunsworth
doaj  

Evolutionary morphology of the haplorhine hamate

The Anatomical Record, EarlyView.
Abstract Primates adopt a variety of hand postures during an impressive diversity of locomotor and manipulative behaviors. Morphological research has found that elements of the hand skeleton, such as the hamate, hold key information for inferring hand use and locomotor kinematics in extinct species.
Laura E. Hunter, Matthew W. Tocheri, Caley M. Orr, Biren A. Patel, Zeresenay Alemseged   +4 more
wiley   +1 more source

Human evolution and the obstetrical dilemma: The pelvic floor hypothesis

The Anatomical Record, EarlyView.
Abstract Human childbirth is mechanically difficult because a large‐headed, broad‐shouldered fetus must pass through a comparatively narrow, twisted bony birth canal. Traditional explanations of this “obstetrical dilemma” emphasize the role of bipedal locomotion in inhibiting the evolution of a wider, more spacious pelvis.
Barbara Fischer, Ekaterina Stansfield
wiley   +1 more source