Richard Bribiescas
@rbribiescas.bsky.social
Evolutionary Anthro professor @ Yale, PRS guitar addict, human evolutionary biology, hormones, reproduction, aging, author “How Men Age”
Estrogenic activity in tampon products academic.oup.com/jes/article/...
Estrogenic activity in tampon products
Abstract. Tampons are widely used menstrual products with prolonged mucosal contact, raising questions about their potential role in exposing females to en
academic.oup.com
June 8, 2026 at 2:28 PM
Estrogenic activity in tampon products academic.oup.com/jes/article/...
Nice Proc B article on climate change and weight gain in owl monkeys by Yale bioanthro PhD student Jonathan Pertile. 👍 @jonathanpertile.bsky.social news.yale.edu/2026/05/20/w...
Warmer temps, heavier owl monkeys: Climate linked to weight gain in primates
A Yale-led study finds that Azara’s owl monkeys have gotten heavier as temperatures rise — a result that defies long-standing expectations about how animals adapt to warm climates.
news.yale.edu
May 22, 2026 at 1:36 PM
Nice Proc B article on climate change and weight gain in owl monkeys by Yale bioanthro PhD student Jonathan Pertile. 👍 @jonathanpertile.bsky.social news.yale.edu/2026/05/20/w...
Reposted by Richard Bribiescas
Congratulations YREL and Yale Anthropology PhD alum Dr. Dorsa Amir on her 2026 APS Spence Award by the Association for Psychological Science @dorsaamir.bsky.social bsky.app/profile/psyc...
Meet @dorsaamir.bsky.social, director of the Mind & Culture Lab at Duke University & 2026 APS Spence Award recipient! #Psychology
Learn about her research, her career, & her advice for the upcoming generation of psychological scientists: www.psychologicalscience.org/publications...
Learn about her research, her career, & her advice for the upcoming generation of psychological scientists: www.psychologicalscience.org/publications...
April 29, 2026 at 1:55 PM
Congratulations YREL and Yale Anthropology PhD alum Dr. Dorsa Amir on her 2026 APS Spence Award by the Association for Psychological Science @dorsaamir.bsky.social bsky.app/profile/psyc...
Reposted by Richard Bribiescas
Navigating Practical, Political, and Ethical Challenges of Long‐Term Human Biology Field Research: The Shuar Health and Life History Project - Snodgrass - 2026 - American Journal of Human Biology - Wiley Online Library onlinelibrary.wiley.com/doi/full/10....
Navigating Practical, Political, and Ethical Challenges of Long‐Term Human Biology Field Research: The Shuar Health and Life History Project
Major advances in understanding human biology and health have been made possible by long-term field research projects with Indigenous peoples, whose ecological settings and lifeways are distinct from...
onlinelibrary.wiley.com
April 19, 2026 at 2:29 PM
Navigating Practical, Political, and Ethical Challenges of Long‐Term Human Biology Field Research: The Shuar Health and Life History Project - Snodgrass - 2026 - American Journal of Human Biology - Wiley Online Library onlinelibrary.wiley.com/doi/full/10....
Reposted by Richard Bribiescas
Our new paper in PNAS. Gut microbes can recycle estrogens. Industrialized populations have greater microbial capacity for estrogen recycling than nonindustrialized populations. www.pnas.org/doi/10.1073/...
Industrialization increases the estrogen-recycling capacity of the gut microbiome | PNAS
Estrogens influence many aspects of human physiology and health, including fertility,
growth, metabolic function, and susceptibility to disease. Up...
www.pnas.org
April 17, 2026 at 2:01 PM
Our new paper in PNAS. Gut microbes can recycle estrogens. Industrialized populations have greater microbial capacity for estrogen recycling than nonindustrialized populations. www.pnas.org/doi/10.1073/...
Read Industrialized populations show greater capacity for estrogen recycling by gut microbes on Kudos: www.growkudos.com/publications... @yalereproeco.bsky.social @grazynajasienska.bsky.social
Industrialized populations show greater capacity for estrogen recycling by gut microbes
The human gut microbiome includes bacteria that can influence how hormones are processed in the body. One important function is the recycling of estrogens: instead of being fully excreted, some estrog...
www.growkudos.com
April 17, 2026 at 1:09 PM
Read Industrialized populations show greater capacity for estrogen recycling by gut microbes on Kudos: www.growkudos.com/publications... @yalereproeco.bsky.social @grazynajasienska.bsky.social
Reposted by Richard Bribiescas
Meet @dorsaamir.bsky.social, director of the Mind & Culture Lab at Duke University & 2026 APS Spence Award recipient! #Psychology
Learn about her research, her career, & her advice for the upcoming generation of psychological scientists: www.psychologicalscience.org/publications...
Learn about her research, her career, & her advice for the upcoming generation of psychological scientists: www.psychologicalscience.org/publications...
April 14, 2026 at 4:33 PM
Meet @dorsaamir.bsky.social, director of the Mind & Culture Lab at Duke University & 2026 APS Spence Award recipient! #Psychology
Learn about her research, her career, & her advice for the upcoming generation of psychological scientists: www.psychologicalscience.org/publications...
Learn about her research, her career, & her advice for the upcoming generation of psychological scientists: www.psychologicalscience.org/publications...
Reposted by Richard Bribiescas
Industrialization increases the estrogen-recycling capacity of the gut microbiome | PNAS www.pnas.org/doi/10.1073/...
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
April 13, 2026 at 8:22 PM
Industrialization increases the estrogen-recycling capacity of the gut microbiome | PNAS www.pnas.org/doi/10.1073/...
Nurturing Bonds: A Qualitative Exploration of Breastfeeding and Responsive Feeding Practices in Samoan Mother‐Infants Dyads - Victoria - 2026 - American Journal of Human Biology - Wiley Online Library onlinelibrary.wiley.com/doi/full/10....
Nurturing Bonds: A Qualitative Exploration of Breastfeeding and Responsive Feeding Practices in Samoan Mother‐Infants Dyads
Introduction Little is known about whether perceptions in Samoa of human milk composition and quality play a role in the decline in exclusive breastfeeding with age, the introduction of solid foods,...
onlinelibrary.wiley.com
April 5, 2026 at 3:09 PM
Nurturing Bonds: A Qualitative Exploration of Breastfeeding and Responsive Feeding Practices in Samoan Mother‐Infants Dyads - Victoria - 2026 - American Journal of Human Biology - Wiley Online Library onlinelibrary.wiley.com/doi/full/10....
Reproductive Ecology and Evolutionary Anthropology: Foundations, Unanswered Questions, and Future Directions - Bribiescas - 2026 - American Journal of Human Biology - Wiley Online Library onlinelibrary.wiley.com/doi/full/10....
Reproductive Ecology and Evolutionary Anthropology: Foundations, Unanswered Questions, and Future Directions
The research field of reproductive ecology continues to be a major contributor to the scientific advancement of evolutionary anthropology and human biology in general. Primary contributions to human ...
onlinelibrary.wiley.com
March 27, 2026 at 12:09 PM
Reproductive Ecology and Evolutionary Anthropology: Foundations, Unanswered Questions, and Future Directions - Bribiescas - 2026 - American Journal of Human Biology - Wiley Online Library onlinelibrary.wiley.com/doi/full/10....
Market Integration and Reproductive Transitions Among Indigenous Shuar and Neighboring Nonindigenous Ecuadorians in Amazonian Ecuador - Madimenos - 2026 - American Journal of Human Biology - Wiley Online Library onlinelibrary.wiley.com/doi/abs/10.1... @yalereproeco.bsky.social
Market Integration and Reproductive Transitions Among Indigenous Shuar and Neighboring Nonindigenous Ecuadorians in Amazonian Ecuador
Objective Global reproductive transitions are well documented, yet less is known about how neighboring populations with divergent histories and exposure to market integration (MI) experience them. T...
onlinelibrary.wiley.com
March 8, 2026 at 5:46 PM
Market Integration and Reproductive Transitions Among Indigenous Shuar and Neighboring Nonindigenous Ecuadorians in Amazonian Ecuador - Madimenos - 2026 - American Journal of Human Biology - Wiley Online Library onlinelibrary.wiley.com/doi/abs/10.1... @yalereproeco.bsky.social
Reproductive and metabolic hormone associations in adult Samoan males with and without obesity url: academic.oup.com/emph/article... @yalereproeco.bsky.social
Reproductive and metabolic hormone associations in adult Samoan males with and without obesity
Implications Obesity has potentially negative effects on male reproductive hormone function in Samoa. While the effects on male fertility remain unclear, f
academic.oup.com
January 9, 2026 at 7:52 PM
Reproductive and metabolic hormone associations in adult Samoan males with and without obesity url: academic.oup.com/emph/article... @yalereproeco.bsky.social
Salivary Testosterone, Age, and Adiposity Associations Among Shuar Males in Amazonian Ecuador Challenge Assumptions of “Normal” Testosterone Patterns - Gildner - 2025 - American Journal of Human Biology - Wiley Online Library onlinelibrary.wiley.com/doi/abs/10.1...
Salivary Testosterone, Age, and Adiposity Associations Among Shuar Males in Amazonian Ecuador Challenge Assumptions of “Normal” Testosterone Patterns
Objectives
Adult male testosterone concentrations in high income countries often decrease with age and adiposity, a pattern typically viewed as “normal.” However, testosterone is expected to be adap.....
onlinelibrary.wiley.com
November 2, 2025 at 5:37 PM
Salivary Testosterone, Age, and Adiposity Associations Among Shuar Males in Amazonian Ecuador Challenge Assumptions of “Normal” Testosterone Patterns - Gildner - 2025 - American Journal of Human Biology - Wiley Online Library onlinelibrary.wiley.com/doi/abs/10.1...
Reposted by Richard Bribiescas
Reposted by Richard Bribiescas
📚 Call for Nominations: HBA Book Award 📚
Know a book that’s made a major impact on human biology? Nominations are now open for the 2026 Human Biology Association Book Award! This award recognizes outstanding contributions to our field—advancing theory, methods, practice, or teaching.
Know a book that’s made a major impact on human biology? Nominations are now open for the 2026 Human Biology Association Book Award! This award recognizes outstanding contributions to our field—advancing theory, methods, practice, or teaching.
May 21, 2025 at 3:42 PM
📚 Call for Nominations: HBA Book Award 📚
Know a book that’s made a major impact on human biology? Nominations are now open for the 2026 Human Biology Association Book Award! This award recognizes outstanding contributions to our field—advancing theory, methods, practice, or teaching.
Know a book that’s made a major impact on human biology? Nominations are now open for the 2026 Human Biology Association Book Award! This award recognizes outstanding contributions to our field—advancing theory, methods, practice, or teaching.
Reposted by Richard Bribiescas
I will be looking for a PhD student for a project on sleep quality and reproductive hormones in women. szkoladoktorska.cm-uj.krakow.pl/pl/how-to-ap...
Join our great team in Krakow.
evoecogroup.wordpress.com/grazyna-jasi...
Join our great team in Krakow.
evoecogroup.wordpress.com/grazyna-jasi...
Szkoła Doktorska Nauk Medycznych i Nauk o Zdrowiu
szkoladoktorska.cm-uj.krakow.pl
May 15, 2025 at 12:20 PM
I will be looking for a PhD student for a project on sleep quality and reproductive hormones in women. szkoladoktorska.cm-uj.krakow.pl/pl/how-to-ap...
Join our great team in Krakow.
evoecogroup.wordpress.com/grazyna-jasi...
Join our great team in Krakow.
evoecogroup.wordpress.com/grazyna-jasi...
Reposted by Richard Bribiescas
"For me, the answer now lies in refusal, the withdrawal of participation from systems that require dishonesty as the price of belonging."
Today I am resigning from the National Science Board and the Library of Congress Scholars Council.
I wrote about my decision in TIME.
time.com/7285045/resi...
Today I am resigning from the National Science Board and the Library of Congress Scholars Council.
I wrote about my decision in TIME.
time.com/7285045/resi...
Why I’m Resigning from the NSF and Library of Congress
I cannot participate in systems that require dishonesty as the price of belonging.
time.com
May 13, 2025 at 11:19 AM
"For me, the answer now lies in refusal, the withdrawal of participation from systems that require dishonesty as the price of belonging."
Today I am resigning from the National Science Board and the Library of Congress Scholars Council.
I wrote about my decision in TIME.
time.com/7285045/resi...
Today I am resigning from the National Science Board and the Library of Congress Scholars Council.
I wrote about my decision in TIME.
time.com/7285045/resi...
Reposted by Richard Bribiescas
One of grants frozen at Cornell: $6.7M (4 yrs) to develop heart pumps for babies born w/ heart defects.
It took decades of work to get to point of prepping device for in-human clinical trials. No private company could do this.
The cruelty of the Trump administration is heartbreaking. So to speak.
It took decades of work to get to point of prepping device for in-human clinical trials. No private company could do this.
The cruelty of the Trump administration is heartbreaking. So to speak.
Research at risk: Life-saving heart pumps for babies | Cornell Chronicle
After receiving a stop-work order from the federal government, the future of a device to help children with heart defects is uncertain.
news.cornell.edu
May 7, 2025 at 11:56 AM
One of grants frozen at Cornell: $6.7M (4 yrs) to develop heart pumps for babies born w/ heart defects.
It took decades of work to get to point of prepping device for in-human clinical trials. No private company could do this.
The cruelty of the Trump administration is heartbreaking. So to speak.
It took decades of work to get to point of prepping device for in-human clinical trials. No private company could do this.
The cruelty of the Trump administration is heartbreaking. So to speak.
Reposted by Richard Bribiescas
May 5, 2025 at 2:30 PM
Reposted by Richard Bribiescas
"I do solemnly swear that I will faithfully execute the Office of President of the United States, and will to the best of my ability, preserve, protect and defend the Constitution of the United States."
May 4, 2025 at 2:22 PM
"I do solemnly swear that I will faithfully execute the Office of President of the United States, and will to the best of my ability, preserve, protect and defend the Constitution of the United States."
📢 Folks. It’s not “underrepresented”, it is “historically excluded”. There is a big difference. One can just happen. The latter more accurately describes the active systemic efforts that keep some out of science and academia. 📢
April 19, 2025 at 5:50 PM
📢 Folks. It’s not “underrepresented”, it is “historically excluded”. There is a big difference. One can just happen. The latter more accurately describes the active systemic efforts that keep some out of science and academia. 📢
Reposted by Richard Bribiescas
Maybe we should honor the women who were real astronauts.
From left to right are Shannon W. Lucid, Margaret Rhea Seddon, Kathryn D. Sullivan, Judith A. Resnik, Anna L. Fisher, and Sally K. Ride. NASA selected all six women as their first female astronaut candidates in January 1978.
From left to right are Shannon W. Lucid, Margaret Rhea Seddon, Kathryn D. Sullivan, Judith A. Resnik, Anna L. Fisher, and Sally K. Ride. NASA selected all six women as their first female astronaut candidates in January 1978.
April 19, 2025 at 3:54 AM
Maybe we should honor the women who were real astronauts.
From left to right are Shannon W. Lucid, Margaret Rhea Seddon, Kathryn D. Sullivan, Judith A. Resnik, Anna L. Fisher, and Sally K. Ride. NASA selected all six women as their first female astronaut candidates in January 1978.
From left to right are Shannon W. Lucid, Margaret Rhea Seddon, Kathryn D. Sullivan, Judith A. Resnik, Anna L. Fisher, and Sally K. Ride. NASA selected all six women as their first female astronaut candidates in January 1978.
Reposted by Richard Bribiescas
Nice to see an old friend actually standing up to the insanity. Kudos to John and the MacArthur Foundation.
www.theguardian.com/us-news/2025...
www.theguardian.com/us-news/2025...
US philanthropists warn against capitulating to Trump: ‘We need to step up’
Foundation leaders say charitable organisations could be next in the firing line – but must ‘stand together’ to resist
www.theguardian.com
April 19, 2025 at 3:17 PM
Nice to see an old friend actually standing up to the insanity. Kudos to John and the MacArthur Foundation.
www.theguardian.com/us-news/2025...
www.theguardian.com/us-news/2025...
Reposted by Richard Bribiescas
Ranking Member Lofgren Urges NSF to Ignore Inflammatory Cruz Report, Releases Democratic Staff Report in Rebuttal democrats-science.house.gov/news/press-r...
Ranking Member Lofgren Urges NSF to Ignore Inflammatory Cruz Report, Releases Democratic Staff Report in Rebuttal | House Committee on Science, Space and Technology
The House Committee on Science, Space and Technology
democrats-science.house.gov
April 18, 2025 at 5:37 PM
Ranking Member Lofgren Urges NSF to Ignore Inflammatory Cruz Report, Releases Democratic Staff Report in Rebuttal democrats-science.house.gov/news/press-r...