Clark Gray

This is wild!

Seven-day-ahead weather forecasts in high-income countries are more accurate than one-day-ahead weather forecasts in low-income countries.

As the number on the list approached the total number likely to be recommended for funding (typically ~75%), each application was presented and discussed. These discussions tended to be rich and could be spirited as each program officer had opinions and also had competing favorites.

6/8

The US is fast-tracking this important HIV drug — for everyone except South Africa Why the Trump administration is cutting out a country that needs it most.

"She said that lenacapavir has become a kind of diplomatic carrot — and stick.

Friendly, compliant governments, like Eswatini, have received early shipments, whereas South Africa or Nigeria — countries that have fallen out of favor with Trump — seem to have received the short end of the stick."

The demographic future that we do not know about The demographic future of the planet has rarely been as questioned as it is today. For much of the 20th century, the demographic transition theory provided a clear narrative: With modernization and de...

Policy should focus not on fertility targets but on how “societies can remain prosperous, equitable & sustainable under conditions of low fertility, population aging & population decline. That is a question better aligned with what we actually know—and with the uncertainties we must acknowledge”

📣 Applications open for GENIUS 2026, a 3-day mentoring workshop at Penn State for rising third- and fourth-year students underrepresented in geography. 🌍

📅 May 27–29.

Apply by Feb. 15, 2026: www.geog.psu.edu/geniusworkshop

Here is a comparison for the world population.un.org/wup/countryp...

Sara Ghebremicael at @uncpopcenter.bsky.social presenting her work on conflict and climate drivers of migration in northern Ethiopia at Wittgenstein Centre conference

Brazil Data Commons: A Platform for Unifying and Integrating Brazil's Public Data The fragmentation of public data in Brazil, coupled with inconsistent standards and limited interoperability, hinders effective research, evidence-based policymaking and access to data-driven insights...

New pre-print! Brazil Data Commons

arxiv.org/abs/2511.11755

Collaborative work led by Isadora Cristina with Ramon Gonze, Jônatas Santos, Julio Reis, Mário Alvim, and Fabrício Benevenuto.

Brazil Data Commons: A Platform for Unifying and Integrating Brazil's Public Data

Map showing eastern Afghanistan Population Density

This morning Andy Tatem is speaking at the #HumanPlanetForum sharing our Global 2 new high-resolution population datasets - as the UN launches World Urbanization Prospects 2025.

Watch live: https://webcast.ec.europa.eu/geo-human-planet-forum-2025-25-11-19

When you gratefully negotiate away your corresponding author status because the open access fee is $5,000… or free, if the corresponding author happens to be from another author’s institution 🤔

Today, launching the World Urbanization Prospects 2025 with new UN estimates and projections of urbanization for
237 countries and areas of the world & 12,000+ cities with 50,000+ inhabitants in 2025. www.un.org/development/... - see also new online datasets and plots: population.un.org/wup/

This figure plots average normalized test scores against the number of yearly extreme heat days by teacher age bin--ages below 54 or 54 and above.

3/5 Using matched student–teacher data from North Carolina plus high-resolution weather data, I find each additional extreme heat day lowers test scores in classrooms taught by the teachers aged 54 and over. For younger teachers, I do not find an effect.

Increasing risk of mass human heat mortality if historical weather patterns recur - Nature Climate Change The authors couple calculations of historical heatwave intensity at present and future global temperatures with exposure–response functions to quantify mortality from extreme heat events in Europe. Th...

📈🚨NEW: Extreme heat events are increasingly threatening to become mass mortality events. In @natclimate.nature.com today, we project tens of thousands of deaths in a single week across Europe if extreme heat domes coincide with rising global temperatures.

www.nature.com/articles/s41...

"The Department of Environment and Society at Utah State University invites applications by environmental social scientists for a tenure-track Assistant Professor position." Interests: energy, water, health, hazards, SES, conservation, human dimensions of resources, adaptation, conflicts.

New preprint w/ @brianthiede.bsky.social and the Nye lab of @unc-emes.bsky.social!:

Marine Heatwaves and Undernutrition in Low- and Middle-Income Countries osf.io/preprints/so...

Here's 1 of 2500+ photos I took last night. My camera is looking south south east. The aurora way brighter and faster last night compared to what I saw the previous night. This is just a teaser, as I have a lot of aurora content that is crunching on my computer now.

A macro photo of a weevil, in profile, upper left in the frame atop a fuzzy gray-green leaf. The weevil is orange with a coating of sparse yellow hairs, some of which are dense enough to form spots.

Apropos of nothing in particular, here is a very small weevil posing majestically. (Brazil)
#Bugsky 🐙🌿

Remaining carbon budget charts

Time is up for 1.5°C. The remaining carbon budget for 1.5°C is virtually exhausted: 170 GtCO2, equivalent to 4 years at the 2025 emissions levels.

join us with the Global Flood Partnership next Wednesday am for our ALL WOMEN remote sensing and flooding webinar! @mirelagtulbure.bsky.social @ekta-aggarwal.bsky.social and I discuss AI and flood mapping +applications re: migration + emergency response www.globalfloodpartnership.org/events/gfp-2...

Climate Change, Environmental Hazards, & Population Dynamics: 1st Climate Conference @mpidr.bsky.social discusses connections between environmental #Hazards #Sustainability & the impact on #SocialInequalities #Mortality #Migration #Fertility #HumanCapital #Health:
www.demogr.mpg.de/en/news_even...

Two postdoctoral opportunities in evolutionary anthropology at Duke - HBES https://academicjobsonline.org/ajo/jobs/30783 Position Description The Pontzer Lab in the Department of Evolutionary Anthropology at Duke University seeks two Postdoctoral Associates for research in h...

Two postdoctoral opportunities in evolutionary anthropology at Duke University!
The Pontzer Lab is hiring for projects on human ecology, energetics, and aging & health.
More info: www.hbes.com/two-postdoct...

Department Chair Geography & Planning Personnel & SupervisionProvide leadership in recruiting, appointing, and retaining faculty and staff. Foster a positive departmental climate by addressing and preventing conflicts. Recommend salaries,...

App State Geog is hiring a dept chair:

My advisee Sara made it there too!

Another paper shows long-term effects of cash transfers on youth mobility, particularly youth mobility for marriage, in Malawi
drive.google.com/fil...

When every child is stunted, no child Is? How local norms distort perceptions of growth: Guest post by Sneha Nimmagadda

In today's job market post, Sneha Nimmagadda shows in India that mothers misperceive how stunted their kids are, because so many other kids around are also stunted. Correcting this perception changes beliefs and feeding practices, increasing weight for age blogs.worldbank.org/en/impacteva...

The Curriculum in Global Studies (CGS) at the University of North Carolina, Chapel Hill (UNC-CH) is seeking applicants for a full-time Teaching Assistant Professor (TAP) in the area of Critical Development Studies and the Global Economy:

Tracking Anticipated Deaths from USAID Funding Cuts Brooke Nichols has launched online tracking tools that capture estimated increases in mortality and disease spread for HIV/AIDS, tuberculosis, malaria, and other diseases as a result of the near-total...

By this time next week, the estimated deaths due to the illegal destruction of USAID and the shuttering of its aid efforts will breach 400,000.

More than 260,000 will be children.

Source: www.bu.edu/sph/news/art...

IBES is hiring! We seek a Visiting Asst Professor for the 2026-27 & 2027-28 academic years with the possibility of renewal. Scholars with expertise in energy, sustainable design, the built environment, and/or environmental justice are particularly encouraged to apply. apply.interfolio.com/176395

NextGenPop Next Generation of Scholars in Population Research

Undergraduate Program in
Population Research
Summer 2026 Session at University of Minnesota
June 7—19, 2026

Our new pub finds flooding impacts on fertility differ in Bangladesh: “We detect…flood-related increases in childbearing among less-educated and higher parity women but find flood-related fertility declines among childless women and those in urban areas.”