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Caley Orr

@caleyorr.bsky.social
1.8K followers 833 following 338 posts

Associate Professor | CU School of Medicine & CU Denver Anthropology | Paleoanthropology, Primate Morphology, Teaching Anatomy, Noisy Rock & Roll, Felis catus | Research: ucdenver.academia.edu/CaleyOrr

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Caley Orr @caleyorr.bsky.social · 19/09/2026
science.org
Proportional limb strengths signal an adaptive shift in arboreality in early human evolution
How much arboreality characterized the Australopithecus locomotor repertoire and how this differed from early Homo are vigorously debated. Most previous studies rely on traits of uncertain functional ...
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Caley Orr @caleyorr.bsky.social · 18/09/2026
African apes--still quite informative about the ancestral hominin anatomy, despite persistent rumors otherwise. Our new paper out now led by the talented Dr. Laura Hunter.
onlinelibrary.wiley.com
African ape carpal morphology is not too specialized to represent the ancestral hominin carpus
Knuckle walking is one hypothesized behavior of the Pan-Homo last common ancestor. We analyzed carpal morphology, including Euclidean distances between behavioral pairs, to investigate whether the ca...
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Caley Orr @caleyorr.bsky.social · 10/09/2026
Revealing Denisovan anatomy bit by bit. The proximal radius doesn't tell us a lot about the postcranial skeleton, but it has a few helpful little clues.
nature.com
Ancient proteins identify various Denisovan remains from Southwest China - Nature
Identification and proteomic analysis of bone fragments and teeth from an excavation in Southwest China provide insight into the evolution and phenotype of Denisovans and fill a geographical gap in th...
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Caley Orr @caleyorr.bsky.social · 09/09/2026
phys.org
'Heel-strike' may have allowed early humans to walk farther—at the cost of high-impact forces
The average person takes thousands of steps each day, instinctively walking heel-to-toe. Although they hardly register them, those consistent heel-first strides are more distinctive to humans than pre...
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Caley Orr @caleyorr.bsky.social · 09/09/2026
newsweek.com
Bombshell Great Pyramid of Giza study retracted
A journal found 'serious flaws' in research behind viral claims of an underground city beneath the Giza pyramids.
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Live Science @livescience.com · 28/08/2026
Strange 'hobbit' species walked more like us than like 'Lucy,' hip bones reveal www.livescience.com/archaeology/...
livescience.com
Strange 'hobbit' species walked more like us than like 'Lucy,' hip bones reveal
Anthropologists studying the hip bones of Homo floresiensis have discovered that its pelvis was human-like, raising new questions about the origin of the enigmatic species.
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Caley Orr @caleyorr.bsky.social · 28/08/2026
🏺🦣 Ancient Adriatic: in 2027, our team will run CU Denver's new archaeological fieldschool on the Island of Vis off Croatia's Dalmatian Coast. Students will learn techniques of modern field archaeology & explore European prehistory. Open to all applicants: studyabroad.ucdenver.edu/_portal/tds-...
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Caley Orr @caleyorr.bsky.social · 25/08/2026
Nice new paper from Lewton et al. on Homo floresiensis pelvic morphology. Comparative Morphometric Analysis of the Pelvis of LB 1 (Homo floresiensis). onlinelibrary.wiley.com/doi/10.1002/...
3D renderings of the LB1 pelvis attributed to Homo floresiensis.
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Caley Orr @caleyorr.bsky.social · 20/08/2026
"The evolution of a bigger brain is therefore a story of carbohydrate foods as much as animal foods: from sweet sugars to cooked starch, from chewing to processing, and from wadging to advanced nutrient extraction." 🧪
science.org
A central role for dietary sugars in human evolution
What did our ancestors eat? Current understanding of diet in human evolution is predicated on abundant animal foods and mastery of fire, both unlikely for early hominins. Using multiple lines of evide...
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James Holland Jones @juemos.bsky.social · 16/08/2026
I've been thinking a lot lately about criticisms of anthropology coming from various quarters. While there is plenty to criticize, I think that the received wisdom about the discipline's problems are generally off base. In this blog post, I work through some thoughts I have on the subject.
eehh-stanford.github.io
The Misunderstanding of the Anthropology Culture Wars – Monkey’s Uncle
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Caley Orr @caleyorr.bsky.social · 16/08/2026
The irony being that a new Dinosaur Jr album is gonna make me so happy. #EarBleedingCountry
ft.com
Dinosaur Jr’s J Mascis: ‘I’m not a fan of happy songs in general’
On a bike ride to a Notting Hill record shop, the alt-rock icon talks panic attacks, the band’s new album and who had the best guitar sound
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Caley Orr @caleyorr.bsky.social · 10/08/2026
"enhanced visual processing, not expansion of the frontal lobe, drove the major increases in neocortical size [in primates]." (from Editor's Summary)
doi.org
Fossil evidence favors a role for vision in the modular evolution of the primate neocortex
Neocortical expansion is a key innovation of crown primates, although fossil evidence for how the neocortex has evolved remains elusive. We studied neocortical evolution using virtual brain endocasts ...
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Caley Orr @caleyorr.bsky.social · 08/08/2026
"These findings support the hypothesis that selection resulted in shifts to P. robustus dental morphology to increase mechanical resistance, consistent with an expanding dietary niche that incorporated increasingly challenging foods."
onlinelibrary.wiley.com
Dietary Adaptation in <fi>Paranthropus robustus</fi> Postcanine Teeth
Upper premolar enamel thickness in Paranthropus robustus increased significantly over time, especially in the occlusal region.
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Caley Orr @caleyorr.bsky.social · 08/08/2026
JOB AD: Assistant/Associate Professor, Anatomy This is a great opportunity for an anatomist with evolutionary/paleobiological research interests to join a nice group of folks who do cool work.
careers-nyit.icims.com
New York Institute of Technology
Prepare to reinvent the future among New York Tech’s community of doers, makers, innovators, and healers. Explore our programs, research, and locations.
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Jens Notroff @jensnotroff.com · 02/08/2026
Smoking gun: "Ancient #DNA [from Chilean mummies] confirms historical accounts of how #smallpox got to the #Americas" (Spoiler: It's exactly who you might've been suspected.) 🏺🧬 www.science.org/content/arti... by @lizziewade.bsky.social via @science.org
science.org
Ancient DNA confirms historical accounts of how smallpox got to the Americas
“Landmark” paper finds disease originated with European contact
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Eleanor Scerri @elliescerri.bsky.social · 28/07/2026
New paper: Mesolithic mariners in the Central Mediterranean made sustained, long distance sea journeys. Not accidents, one offs, and not rare events. See thread in the comments. academic.oup.com/pnasnexus/ar..., led by @jblinkhorn.bsky.social
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Marc Kissel @marckissel.bsky.social · 29/07/2026
www.nature.com/articles/d41... "We can almost look through the eyes of the Aurignacian people and see how they viewed the environment around them,” says Amy Clark, a palaeolithic archaeologist at Harvard University in Cambridge, Massachusetts."
nature.com
40,000-year-old bird carvings provide clues to how ice age humans flourished
Newly discovered figurines point to skills that might have helped shape early humans’ expansion across Europe.
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Caley Orr @caleyorr.bsky.social · 18/07/2026
🏺🧪
nature.com
Population expansion of early Upper Palaeolithic hunter-gatherers triggered cultural complexity on Paleo-Honshu Island, Japan - Nature Communications
Early Upper Palaeolithic stone tools appear in Japan around 38 thousand years ago and are unique from contemporaneous tools found elsewhere in eastern Eurasia. Here, the authors present an absolute ch...
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The Anatomical Record @anatrecord.bsky.social · 12/07/2026
How did primate hand function evolve? 🐒 Hamate bone morphology suggests natural selection shaped key hand traits linked to grip & locomotion. Suspensory behaviors evolved independently in gibbons & great apes Hunter et al.: anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
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Harvati Lab @harvatilab.bsky.social · 06/07/2026
📢 New #openaccess paper out! Exploring the evolutionary drivers of encephalization and facial reduction in the genus Homo. 🧠💀 Check it out here: rdcu.be/fsgmj Congrats to Mark and Katerina @katharv.bsky.social for this work! ✨️ #humanevolution @humanorigins.bsky.social
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drphilcox.bsky.social @drphilcox.bsky.social · 22/06/2026
JOB ALERT! We are recruiting at @ucl-c4ia.bsky.social - a lecturer (Grade 8) or associate professor (Grade 9) in primate or human evolutionary anatomy (research and teaching). Contact Susan Evans or myself for further details. www.jobs.ac.uk/job/DRZ412/l...
jobs.ac.uk
Lecturer / Associate Professor in Primate or Human Evolutionary Anatomy at UCL
Searching for an academic job? Explore this Lecturer / Associate Professor in Primate or Human Evolutionary Anatomy opening on jobs.ac.uk! Click to view more details and browse other academic jobs.
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Chris Stringer @chrisbstringer.bsky.social · 03/07/2026
My thoughts on the paper about 'Hobbit' capabilities
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Dr. E Grace Veatch @egveatch.bsky.social · 03/07/2026
🐘 check out our newest paper from Liang Bua! www.science.org/doi/10.1126/... Did H. floresiensis hunt Stegodon? 🔪 Did they also had control use of fire? 🔥 We tested these early claims of complex behavior using taphonomy, experimental archaeology, and zooarchaeology of the Stegodon assemblage.
doi.org
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Paige Madison @fossilhistory.bsky.social · 27/06/2026
A few words from archaeologist Jamie Hodgkins on the latest H. naledi paper, which is cool and impressive overall (congrats to the proteomics team on this) but risks being overshadowed by claims from some team members that are a reach. 1/2
The latest proteomic paper on H naledi is fascinating, and frankly not surprising. The tooth morphology has long indicated that this was a population with exceptionally low variation, so the proteomic results are consistent with that pattern. The paper itself is strong. As with all science, future amelogenin‑based studies will determine whether this method can reliably determine biological sex with high confidence in older contexts, and different species. Personally, I think the paper is cool, and congratulations to Dr. Madupe.
What is frustrating is that this finding, like everything associated with H. naledi, is immediately folded back into the burial claim.  The defenses of the H. naledi burial claim always circle back to the same two talking points:
1) that "experts" don't think a small‑brained hominin could possibly bury its dead, and
2) that "experts" don't think that H. naledi had “culture.”
I find both points puzzling. The small brain size of H. naledi has not been a major concern for most researchers or reviewers; the only people emphasizing it are the project directors who emphasized the point in their Netflix show. There is no known brain‑size threshold required for mortuary behavior, or for most behaviors, for that matter. Non‑human animals have been observed covering and attending to their dead.
The “culture” argument is equally confusing. If culture is defined as a system of shared, learned, socially transmitted behaviors, knowledge, and practices that shape how a group interacts with the world, then I am not aware of anyone in paleoanthropology who doubts that all hominins had culture in some form. We know that different chimpanzee communities have distinct behavioral repertoires and tool‑use patterns. Ravens, crows, bowerbirds, capuchins, macaques, and baboons all exhibit group‑specific behaviors: culture by any reasonable definition. 
Importantly, as I have discussed before baboons, chimpanzees, and bears use caves as birthing dens...
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Kai Caspar @nomascus.bsky.social · 31/05/2026
New study on the evolution of primate cognition, brain size, sensory and motor functions, prompted by "recent work showing fishes perform as well as primates on various cognitive tests." 🐟🦍🧪 Great to see such broad comparative perspectives driving research. onlinelibrary.wiley.com/doi/10.1002/...
onlinelibrary.wiley.com
Sensorimotor Complexity and Cognition as Predictors of Primate Brain Size
Objectives As animal brain size increases, cognitive performance generally increases. However, other key brain functions, such as the regulation of somatic processes, processing of sensory input, an...
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Caley Orr @caleyorr.bsky.social · 15/05/2026
It's a good thing I quit anteaters after Orr, 2005.
youtube.com
Expert Wasted Entire Life Studying Anteaters
YouTube video by The Onion
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Caley Orr @caleyorr.bsky.social · 15/05/2026
Damnation and hellfire be upon us. We've earned it.
stereogum.com
16 Horsepower Reunite For First Show In 22 Years: Watch
In the ’90s and ’00s, the Denver-based band 16 Horsepower perfected their own grandly gothic form of country-rock. They were obsessed with religion and apocalypse, and frontman David Eugene Edwards ha...
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Caley Orr @caleyorr.bsky.social · 13/05/2026
nature.com
Enamel proteins from six Homo erectus specimens across China - Nature
Palaeoproteomic analysis of ancient enamel proteins extracted from Middle Pleistocene Homo&nbsp;erectus specimens from the Zhoukoudian, Hexian and Sunjiadong sites in China suggests that they are a ne...
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Caley Orr @caleyorr.bsky.social · 02/05/2026
You can feel anything you want to feel and call it real. *SEBADOH*
youtu.be
Sebadoh - Live 1999
YouTube video by vacantmoon
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Punk Rock History @punkrockhistory.bsky.social · 28/04/2026
46 years ago today Joy Division filmed "Love Will Tear Us Apart" music video in Manchester, England, April 28, 1980. Joy Division - Love Will Tear Us Apart, 1995 Remastered Version (Official Video) #punk #punkrock #postpunk #joydivision #history #postpunkhistory #otd
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Aylwyn Scally @aylwyn-scally.bsky.social · 29/04/2026
'Anglo-Saxon' is a bogus and misleading term in all but a very narrow set of uses. And I'm not sure it's entirely helpful even in those. But I think it's particularly bad as an ancestry category, certainly when applied to present day individuals, and probably in the past also.
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Christian Rowan @crowan-tectonics.bsky.social · 23/04/2026
Excited to share our new paper published today in @natcomms.nature.com! We find that the crust beneath the Turkana Rift is extremely thin, and that the rift’s maturation played a key role in shaping the accumulation of Turkana’s world-famous hominin fossil record. www.nature.com/articles/s41...
nature.com
Necking of the active Turkana Rift Zone and the priming of eastern Africa for continental breakup - Nature Communications
This study indicates that the East African Rift System in northern Kenya may be closer to breaking apart than previously thought and that its development played an important role in the preservation o...
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Caley Orr @caleyorr.bsky.social · 28/04/2026
Majoring in anthropology as an undergrad at CU Boulder is the single best decision I've made in my life.
washingtonpost.com
Opinion | This degree changed my life. And it’s essential to a changing America.
Anthropology taught me how to translate human experience into knowledge institutions can act on.
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Caitlin S., PhD @paleophile.bsky.social · 26/04/2026
I'm glad to see WaPo and Forbes covering the #NSF #NSB terminations. The public needs to understand that scientific research in the US, as we have known it for three quarters of a century, is collapsing and it may take a decade or decades to recover from this. www.washingtonpost.com/science/2026...
washingtonpost.com
Trump ousts National Science Board members
Members of the independent board that guides the National Science Foundation said they received a notice from the White House that their position was being terminated.
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Caley Orr @caleyorr.bsky.social · 26/04/2026
The Lufthansa Group is cancelling 20,000 short haul flights through October. Not what you want to find out just as summer fieldwork plans are advancing.
pbs.org
What to know if your flight is canceled as jet fuel costs rise
With airlines worldwide canceling flights as the war in the Middle East strains jet fuel supplies and pushes up prices, here's what to know if your flight is canceled.
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Caley Orr @caleyorr.bsky.social · 25/04/2026
🤘
thehardtimes.net
Anthropologists Discover Uncontacted Metal Subgenre
STOCKHOLM, Sweden — Leading musical anthropologists announced that they have discovered a previously uncontacted metal genre, confirmed sources. “I was exploring through... Read more nonsense
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Dr Laura T. Buck @ltbuck.bsky.social · 21/04/2026
New evaluation of the taxonomic affinities of the Late Pleistocene fossil hominin from Kabua, Kenya. Very happy to finally have the chance to finish and publish this work, nearly a decade after a very happy time in Tuebingen working on it with excellent colleagues. doi.org/10.1111/1467...
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Eleanor Scerri @elliescerri.bsky.social · 23/04/2026
1/7 Our papers may seem to address different themes, but they coalesce around the deep human past as a process of niche expansion and feedbacks, into the transition to human dominated landscapes. A starting point was the pan-African structured theory of human origins: www.cell.com/trends/ecolo...
cell.com
Did Our Species Evolve in Subdivided Populations across Africa, and Why Does It Matter?
We challenge the view that our species, Homo sapiens, evolved within a single population and/or region of Africa. The chronology and physical diversity of Pleistocene human fossils suggest that morpho...
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Evolution Soup @evolutionsoup.bsky.social · 22/04/2026
✨NEW INTERVIEW✨ ANCESTOR OF THE APES ~ The Masripithecus Discovery ~ with DR ERIK SEIFFERT @gutsickgibbon.bsky.social @erikseiffert.bsky.social #evolution #evolutionsoup #fossil #science #primates 👇🏼👇🏾 youtu.be/vGdkAOO32rg
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Caley Orr @caleyorr.bsky.social · 21/04/2026
quantamagazine.org
What Physical ‘Life Force’ Turns Biology’s Wheels? | Quanta Magazine
The bacterial flagellar motor is finally understood after 50 years. In its workings, columnist Natalie Wolchover finds the essence of life.
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Caley Orr @caleyorr.bsky.social · 19/04/2026
No evidence that hominin dispersal across Eurasia was part of a wider turnover in mammal distributions
nature.com
No evidence that hominin dispersal across Eurasia was part of a wider turnover in mammal distributions - Nature Communications
Hominin dispersal out of Africa may have corresponded with exchanges of other fauna out of Africa. Here, the authors examine taxonomic and functional similarities in Eurasian and African fossil commun...
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Caley Orr @caleyorr.bsky.social · 18/04/2026
Wow. This is an amazing cover of Butthole Surfers' song "Pepper."
youtu.be
Pepper
YouTube video by S.G. Goodman - Topic
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Caley Orr @caleyorr.bsky.social · 18/04/2026
youtu.be
Minneapolis rooftop on infamous album from The Replacements
YouTube video by FOX 9 Minneapolis-St. Paul
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PaleoAnthropology @qafzeh.bsky.social · 17/04/2026
hms.harvard.edu/news/massive...
hms.harvard.edu
Massive Ancient-DNA Study Reveals Natural Selection Has Accelerated in Recent Human Evolution
Hundreds of genes selected in West Eurasia since farming began, many linked to health
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Dr Huw Groucutt @huwgroucutt.bsky.social · 15/04/2026
New paper alert. My new article just published in Quaternary Science Reviews, "Revolution, modernity, and the dispersal of Homo sapiens beyond Africa". www.sciencedirect.com/science/arti...
sciencedirect.com
Revolution, modernity, and the dispersal of Homo sapiens beyond Africa
In the recent past, evolutionarily speaking, every other kind of hominin, from the Neanderthals of western Eurasia to the ‘hobbits’ of Flores, became …
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Eleanor Scerri @elliescerri.bsky.social · 15/04/2026
Our new paper exploring the measurement of complexity in tools - the result of significant and ongoing work, including that which emerged from our Complexity in Lithics Conference! link.springer.com/article/10.1...
link.springer.com
The Tool Systems Approach: Measuring Complexity in the Primatological, Archaeological, and Ethnographic Records - Journal of Archaeological Method and Theory
Measuring technological complexity across species, as well as across temporal and spatial scales, is an ongoing challenge among authors who work on primatological, archaeological, and/or ethnographic ...
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Caley Orr @caleyorr.bsky.social · 14/04/2026
Finds from the Halibee site in the Middle Awash, Ethiopia including stone tools and human remains.
sciencealert.com
Ancient Landscape Reveals Bones of Humans Who Lived 100,000 Years Ago
A monumental archaeological excavation in Africa has uncovered the lives of the humans who lived there 100,000 years ago.
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Caley Orr @caleyorr.bsky.social · 11/04/2026
theconversation.com
Embryo fossil found in South Africa is world’s oldest proof that mammal ancestors laid eggs
A detailed scan of a fossil therapsid embryo reveals the oldest egg belonging to a mammalian ancestor.
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Evolution Soup @evolutionsoup.bsky.social · 11/04/2026
A massive once-in-500-years chimpanzee civil war has broken out (link fixed!) 🦧 @gutsickgibbon.bsky.social #evolution #evolutionsoup #fossil #science #chimps 👇🏼👇🏾 is.gd/uheC0U
A massive once-in-500-years chimpanzee civil war has broken out
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Marc Kissel @marckissel.bsky.social · 09/04/2026
Awhile back I meet the brilliant Jenni French & and now been lucky to collab on a project w/ her for the last ~3 yrs. Along with Somaye Khaksar & @anthrofuentes.bsky.social our 1st project paper is out, on origins & development of mobile containers (1/n) 🧪 🧺 www.sciencedirect.com/science/arti...
sciencedirect.com
The origins and development of mobile containers: Biocultural perspectives on Pleistocene containment
Containers are ubiquitous and universal across all present-day societies. The substantial increase in the quantity and diversity of containers in the …
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