Advertisement · 728 × 90

Posts by Richard Bribiescas

Preview
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...

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....

1 day ago 0 0 0 0
Preview
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...

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/...

4 days ago 1 1 0 0
Preview
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...

Read Industrialized populations show greater capacity for estrogen recycling by gut microbes on Kudos: www.growkudos.com/publications... @yalereproeco.bsky.social @grazynajasienska.bsky.social

4 days ago 2 1 0 0
Video

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...

6 days ago 17 3 0 0
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...

Industrialization increases the estrogen-recycling capacity of the gut microbiome | PNAS www.pnas.org/doi/10.1073/...

1 week ago 3 1 0 0
Preview
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,...

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....

2 weeks ago 1 0 0 0
Preview
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 ...

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....

3 weeks ago 3 2 0 0
Preview
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...

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

1 month ago 2 0 0 0
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

Reproductive and metabolic hormone associations in adult Samoan males with and without obesity url: academic.oup.com/emph/article... @yalereproeco.bsky.social

3 months ago 3 1 0 0
Advertisement
Preview
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.....

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...

5 months ago 2 0 0 0

Stay strong @harvard.edu

10 months ago 127 15 3 0

📚 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.

10 months ago 1 2 1 0
Szkoła Doktorska Nauk Medycznych i Nauk o Zdrowiu

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...

11 months ago 4 5 0 0
Preview
Why I’m Resigning from the NSF and Library of Congress I cannot participate in systems that require dishonesty as the price of belonging.

"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...

11 months ago 17195 5948 475 508
Preview
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.

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.

11 months ago 3370 1768 89 153
Post image

Page One must have been crowded.

So NYT puts it on Page 13. 🤡

@schooley.bsky.social

11 months ago 26260 7815 969 566
Post image

"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."

11 months ago 36677 12322 2952 1130

Congratulations!🍾 Richly deserved!!

11 months ago 1 0 0 0

📢 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. 📢

1 year ago 5 1 0 0
Advertisement
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.

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.

1 year ago 27491 6714 516 284
Preview
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

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...

1 year ago 42 11 0 1
Preview
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

Ranking Member Lofgren Urges NSF to Ignore Inflammatory Cruz Report, Releases Democratic Staff Report in Rebuttal democrats-science.house.gov/news/press-r...

1 year ago 6 5 0 0

University faculty are not powerless. Explore, identify, discuss and share opportunities for leverage.

1 year ago 1 1 0 0
Sievert 2024
Sievert 2024 YouTube video by Yearbook of Biological Anthropology

Dr. Lynnette Sievert - a short video summary of her Yearbook pub, ""Evolutionary Perspectives, Comparative Approaches, and the Lived Experience of Menopause."

youtu.be/dm3IDoDyWPw

1 year ago 7 5 1 0
Preview
Women, minorities fired in purge of NIH science review boards Scientists, with expertise in fields that include mental health, cancer and infectious disease, typically serve five-year terms and were not given a reason for their dismissal.

Thirty-eight of 43 experts cut last month from the boards that review the science and research that happens in laboratories at the National Institutes of Health are female, Black or Hispanic, according to an analysis by the chairs of a dozen of the boards.

1 year ago 10238 5248 645 637
Preview
Testosterone, 8‐Oxo‐2′‐Deoxyguanosine (8‐OHdG) and Cu/Zn Superoxide Dismutase (SOD) in Adult Shuar Males of Amazonian Ecuador: A Test for Evidence of Trade‐Offs Between Reproductive Effort and Oxidative Stress Objectives Reproductive effort incurs the cost of biological aging and morbidity by compromising somatic maintenance when key resources are limited. Oxidative stress is positively correlated with re...

doi.org/10.1002/ajhb...

1 year ago 2 1 0 0

Harvard has set an example for other higher-ed institutions - rejecting an unlawful and ham-handed attempt to stifle academic freedom, while taking steps to make sure students can benefit from an environment of intellectual inquiry, rigorous debate and mutual respect. Let’s hope others follow suit.

1 year ago 89549 18232 1572 746
Harvard Will Fight Trump’s Demands | News | The Harvard Crimson Harvard will not comply with the Trump administration’s demands to dismantle its diversity programming and limit student protests in exchange for its federal funding, University President Alan M. Garb...

Harvard will not comply.

“No government — regardless of which party is in power — should dictate what private universities can teach, whom they can admit and hire, and which areas of study and inquiry they can pursue.”
— Harvard President Alan M. Garber

www.thecrimson.com/article/2025...

1 year ago 1081 299 17 32
Advertisement

👏😋

1 year ago 1 0 0 0