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Ryan Greenway

@ryangreenway

Science and illustration. Ecological research coordinator for the Genes and Behavior group at MPI-AB.

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16.12.2025
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Latest posts by Ryan Greenway @ryangreenway

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NIH reneges on recognizing union for early career researchers The biomedical research agency says trainees in its labs are not “employees”

NIH sent notice this week that it will no longer recognize a union of early career researchers on the basis that trainees aren't "employees." My latest for @science.org.

www.science.org/content/arti...

05.03.2026 18:18 👍 27 🔁 11 💬 0 📌 0
Koalas (Phascolarctos cinereus), such as this mother and 7-month-old joey from Queensland, Australia, embody a genetic paradox. Populations rich in diversity are declining, whereas those with little variation are expanding and rapidly reshuffling their genomes. These findings reveal that diversity alone does not determine resilience. Instead, a population’s fate depends on several evolutionary processes unfolding across generations.

Koalas (Phascolarctos cinereus), such as this mother and 7-month-old joey from Queensland, Australia, embody a genetic paradox. Populations rich in diversity are declining, whereas those with little variation are expanding and rapidly reshuffling their genomes. These findings reveal that diversity alone does not determine resilience. Instead, a population’s fate depends on several evolutionary processes unfolding across generations.

According to a new study of Australia’s koala populations, rapid demographic rebound may be able to restore once-lost genetic variation and drive recombination in ways that re-establish long-term evolutionary potential in previously bottlenecked populations.

Learn more: https://scim.ag/4b6hLaE

05.03.2026 19:05 👍 42 🔁 11 💬 0 📌 0
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Been wanting to write this one for awhile!

Conservation obsesses over rare species. But what about the common ones?

Bluegill are the fish almost everyone knows & caught as a child. But, how much do we REALLY know?

New long-form essay 👇 🎣 #InDefeseOfPanfish tnature.substack.com/p/behold-the...

03.03.2026 19:57 👍 34 🔁 11 💬 2 📌 0

A war that isn't a war, documented with videos that may or may not be real, funded by elected leaders who are neither for nor against it, is the most dystopian thing that's happened in my lifetime

05.03.2026 00:59 👍 4247 🔁 1030 💬 34 📌 31

You're absolutely right—that was not a command post, that was an elementary school. Those were not military leaders—they were schoolchildren. I said the opposite, and that's on me.

05.03.2026 04:51 👍 2298 🔁 320 💬 21 📌 9
An ancient aspen tree is growing moss at the stem.

An ancient aspen tree is growing moss at the stem.

Fallen trees are covered with moss on the forest floor.

Fallen trees are covered with moss on the forest floor.

Old-growth boreal forests have so much more life in them compared to monoculture plantations. Ancient trees decay for ages on the forest floor, providing habitat for plants and animals. Vitality everywhere you look.

05.03.2026 06:07 👍 68 🔁 13 💬 1 📌 1

It's the funding of taxonomic research & training that's dying out. Without an ability to identify life forms, we can't recognize/quantify invasions & extinctions and their impacts on ecosystems. Imagine trying to repair a complex steel structure if you can't distinguish different types of bearings.

03.03.2026 04:27 👍 49 🔁 17 💬 4 📌 1

Three weeks ago I spent a few days in one of our global dark sky sanctuaries in Rakiura Stewart Island New Zealand. Never has deep time felt so real or so close.

But every now and then one of Elon's dumbfuck satellites would interrupt the eternal rhythms of the stars. Let's not let it get worse.

27.02.2026 05:27 👍 510 🔁 151 💬 17 📌 4
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A New Wharton Study on AI Warns of a Growing Problem: Cognitive Surrender Casual users should pay special attention

This is a mental war that we have to win. It's not about being a luddite, it's about destroying or retaining the ability to think. It's about how insidious this becomes in a situation where generative AI is adopted and then subverted intentionally.

www.thealgorithmicbridge.com/p/a-new-whar...

24.02.2026 20:28 👍 674 🔁 239 💬 12 📌 25
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Ten simple rules for building a collaborative coding culture

This was such a fun collaboration with @analog-ashley.bsky.social and team, including some of our own @sciencebanshee.bsky.social and @shen4brains.bsky.social And h/t to Alana McPherson for the infographic!

dx.plos.org/10.1371/jour...

23.02.2026 21:01 👍 16 🔁 8 💬 0 📌 2
Sketch book page showing pencil drawings of a male Xiphophorus birchmannj and male Poecilia salvatoris.

Sketch book page showing pencil drawings of a male Xiphophorus birchmannj and male Poecilia salvatoris.

Couple poeciliid sketches for #SundayFishSketch
Xiphophorus birchmanni and Poecilia salvatoris
#poeciliidae #SciArt

22.02.2026 20:43 👍 21 🔁 7 💬 0 📌 0
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How specific are heritable symbioses?

And what can we learn from swapping obligate symbionts across host species?

We address this in our latest, led by @inespons.bsky.social & in our collaboration w/ @microbiome.bsky.social 🦠🪲 Out today in @natcomms.nature.com!

1/n
www.nature.com/articles/s41...

16.02.2026 07:24 👍 114 🔁 70 💬 3 📌 3
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New in JFB: Alfaro huberi must have one of the strangest mating behaviors among poeciliid fishes. #TeamFish #FishSci

Paper: onlinelibrary.wiley.com/doi/10.1111/...
Corresponding video: www.youtube.com/watch?v=cKWA...

19.02.2026 15:54 👍 24 🔁 8 💬 3 📌 3
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Are you an relatively new to field ecology and data collection? Or are are you supervising students? Our guide for effective field data collection is now published in @methodsinecoevol.bsky.social! We also include a printable poster with a visual overview of the guide
doi.org/10.1111/2041...

16.02.2026 08:25 👍 61 🔁 27 💬 1 📌 0
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The billionaires' eugenics project: how Epstein infiltrated Harvard, muzzled the humanities and preached master-race science Edge - Jeffrey Epstein's favourite intellectual salon - was sold to me as a gathering of the world's finest minds, writes Virginia Heffernan. The files reveal it was something far darker: a decades-lo...

This is hands-down the best thing I’ve read on Epstein‘s worldview and those of his fellow tech, finance, and academic elite. It’s a rough read, but at least every paragraph is a banger. 🔥🔥🔥😭

15.02.2026 13:36 👍 119 🔁 54 💬 3 📌 9

I'm super excited to share that this article was published today in Science! www.science.org/doi/10.1126/...

All made possible by the fantastic group of donors, volunteers and scientists at The American Chestnut Foundation (tacf.org), HudsonAlpha Institute for Biotechnology, and our collaborators.

12.02.2026 19:26 👍 100 🔁 45 💬 3 📌 5
Pen and watercolour illustrations of waders/shorebirds from the Hartlepool/Teesmouth area of northeast England

Pen and watercolour illustrations of waders/shorebirds from the Hartlepool/Teesmouth area of northeast England

A not-completely-exhaustive illustration of our winter shorebirds, but these are the species that you’re most likely to see during winter around Teesmouth (northeast England).
🐡🪶
#birdingNortheast

11.02.2026 16:47 👍 2107 🔁 255 💬 42 📌 10
Auf dem Bild ist ein Biber zu sehen. Der Text: Jetzt Petition unterzeichnen: Schützt die Biber!

Auf dem Bild ist ein Biber zu sehen. Der Text: Jetzt Petition unterzeichnen: Schützt die Biber!

🦫 Die neue Biberverordnung in Baden-Württemberg sieht vor, dass Biber leichter getötet werden können. Aber der #Biber ist nicht das Problem, sondern die Lösung: Er ist eine Schlüsselart für unsere Natur! Hilf uns, Biber in BaWü zu schützen.
✏️ Zur Petition ➡️ petitionen.landtag-bw.de/Petitionen/D...

11.02.2026 08:04 👍 63 🔁 25 💬 3 📌 0

Using behavior experiments, environmental data, and genomic analyses on a global collection of wild C. elegans isolates, we show that variation in aggregation behavior is likely driven by natural selection in response to elevational gradients.

10.02.2026 15:33 👍 3 🔁 0 💬 0 📌 0
Multi panel figure from a scientific manuscript. Panel A shows a map of the globe with sampling sites for different isolates of C. elegans indicated. Panel B shows two plots demonstrating variation in different aspects of a collective aggregation behavior among globally collected strains.  Two strains which greatly differ in the magnitude of aggregation are highlighted below the graphs, with circular plots showing the representative distribution of worms during experiments. The less aggregating strain has individuals dispersed across the field of view, the more aggregating has clumps of individuals gathered together.

Multi panel figure from a scientific manuscript. Panel A shows a map of the globe with sampling sites for different isolates of C. elegans indicated. Panel B shows two plots demonstrating variation in different aspects of a collective aggregation behavior among globally collected strains. Two strains which greatly differ in the magnitude of aggregation are highlighted below the graphs, with circular plots showing the representative distribution of worms during experiments. The less aggregating strain has individuals dispersed across the field of view, the more aggregating has clumps of individuals gathered together.

New preprint from the Genes and Behavior group! @mpi-animalbehav.bsky.social @cbehav.bsky.social
Youn Jae Kang led this study on the evolution of a collective behavior in C. elegans. doi.org/qq3t

10.02.2026 15:33 👍 10 🔁 3 💬 1 📌 0
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Winning insect images revealed in RES Photography Competition 2025 View the Insect Week galleries

📸 We’re delighted to unveil the winners of the RES #InsectWeek Photography Competition 2025!

🏆 Overall Winner Raghuram Annadana (IG: macro_by_raghu). The image shows a parasitic wasp laying its eggs inside Banana Skipper butterfly eggs.

Read more and view the galleries 🔽

10.02.2026 14:30 👍 34 🔁 15 💬 0 📌 0
A 2 panel sketch disgram of a 1 meter tall pod. in the second panel, an oval section pops off and a demonic little face with short tentacles flies out, crudely drawn.

A 2 panel sketch disgram of a 1 meter tall pod. in the second panel, an oval section pops off and a demonic little face with short tentacles flies out, crudely drawn.

My favorite artifact in the "you don't need AI to do art" discourse is, of course, screenwriter Dan O'Bannon's sketch of the facehugger to explain it to Giger.

07.02.2026 18:39 👍 9159 🔁 2830 💬 77 📌 92
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Epstein files reveal deeper ties to scientists than previously known Latest batch of documents show researchers consulting the financier and sex offender on publications, visas and more.

www.nature.com/articles/d41...

07.02.2026 17:36 👍 347 🔁 139 💬 32 📌 20
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Is Woodpecker Drumming More Than Noise? We hear woodpecker drumming everywhere, but rarely ask what it truly signals. This Conceptual Note looks at what we know — and what we don’t.

We hear woodpecker drumming everywhere, but rarely ask what it truly signals. This Conceptual Note looks at what we know — and what we don’t.

theornithologist.org/is-woodpecke...

#birds #birding #Woodpeckers #TheOrnithologist #ornithology

07.02.2026 07:44 👍 17 🔁 5 💬 0 📌 0
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Resilient by nature: managed rearing does not erode physiochemical tolerances of an extremophile fish Abstract. Populations in managed care are valuable resources that complement in situ conservation efforts, but adaptation to captive conditions and other d

New Biology Letters paper! 🐟🐟🐟
Long-term lab rearing did not erode key physiological tolerances in an extremophile fish; encouraging for ex-situ conservation! #FishSci
royalsocietypublishing.org/rsbl/article...

05.02.2026 21:10 👍 12 🔁 4 💬 0 📌 1

While reporting this, I had something happen that's never happened. A comms rep for one of the co's disputed my reporting and said what I was telling them was untrue because it was not in Grok, xAI's chatbot.

I was looking directly at the files. And this person was using AI to challenge the truth.

05.02.2026 17:38 👍 9565 🔁 3241 💬 202 📌 227
A hermit thrush, a passerine with brown head, back, and wings and a white breast with brown speckles; photo by Mick Thompson, via Flickr

A hermit thrush, a passerine with brown head, back, and wings and a white breast with brown speckles; photo by Mick Thompson, via Flickr

From 1981 to 2016, hermit thrushes migrating through Chicago became smaller, with shorter bills and longer wings, relative to body size— there are genetic changes associated with shortening bills, but not the other changes 🌿 🪶

buff.ly/gzX4Oz0

05.02.2026 14:54 👍 16 🔁 2 💬 0 📌 0
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The Texas AI Boom is Outpacing Water Regulations Each data center can “drink” as much as an entire community. Yet, Texas does not require these tech firms to disclose projected or actual water consumption.

"We have no way of reconciling what these cases will do to water supplies."

New from Miranda Williamson: The world’s largest artificial intelligence data center complex is being built in Amarillo, and it’s almost seven times the size of Central Park.

04.02.2026 19:40 👍 111 🔁 70 💬 11 📌 23
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Illinois Rewilding Law, first in US, a step toward state wetland protection Officials and environmentalists, pushing for state regulation of wetlands, say law will help close federal gaps after Trump rollbacks.

As sweeping changes to the federal Clean Water Act in recent years have weakened protections for wetlands, Illinois has become the first state in the nation to officially recognize a conservation tactic known as rewilding.

04.02.2026 16:32 👍 33 🔁 15 💬 1 📌 0