Ellen Hopmans

So happy to share that my friend Francien Peterse has won the prestigious John Hayes Award.🎉 More than deserved👏🏻👏🏻👏🏻👏🏻.

geochemsoc.org/news/francie...

Seasonal Changes in Marine Archaeal Tetraether Lipid Export Depth Linked to Net Primary Productivity Global marine sediment traps record seasonal changes in archeal tetraether lipid export from two depth-differentiated ecological groups Contribution of shallow-clade archaeal tetraethers increase...

This is a #TeamArchaea GDGT paper that I could not wait to see published in a journal after peer-review!
Addison Rice et al. (2026) PALO @agu.org:
doi.org/10.1029/2025...
With @appysluijs.bsky.social among the co-authors.
#GDGTs #isoGDGTs
🧪 ⚒️ 🌊 👩‍🔬
With implications for #PaleoSky

He's just full of positive energy🥰

Love the happy oxyhead dude on the right👌

Evaluating the Reliability of Grain‐Size Sorting for Organic Biomarker Analysis We investigate the potential of using grain-size sorted marine sediments for biomarker analysis GDGT distributions are consistent regardless of grain-size sorting, and fine-grained sediment fract...

Can global archives of fine-grained marine sediments be “resurrected” for biomarker analysis? The answer is (mostly) yes!

Read more here: agupubs.onlinelibrary.wiley.com/doi/10.1029/...

Congratulations to @joehingley.bsky.social for publishing his first PhD manuscript - great work!

Comic. [2x2 chart. Top left quadrant: seem like dinosaurs x are dinosaurs. Silhouettes of dinosaurs stegosaurus, triceratops, tyrannosaurus, velociraptor, and long-neck dinosaur. Top right quadrant: seem like dinosaurs x are not dinosaurs. Silhouettes of mosasaur, quetzalcoatlus, dimetrodon, plesiosaur, and pteranodon. Bottom left quadrant: don’t seem like dinosaurs x are dinosaurs. Silhouettes of penguin, egret, ostrich, pigeon, falcon. Bottom right: don’t seem like dinosaurs x are not dinosaurs. Silhouettes of squirrel, stapler, plant, person, and bicycle.]

Dinosaurs And Non-Dinosaurs

xkcd.com/3204/

Sign in a church on Tenerife for the Chapel of the Lord of Columns.

Alterpiece showing a statue of the Lord of Columns.

If you want good chromatography, better get on your knees and pray you unbelievers.😇 #divineintervention

So many times I needed near toxic amounts of naproxen to keep it together at work. I passed my PhD defense while suffering severe cramps. A hysterectomy later I learned I had grade 3 adenomyosis, a form of endometriosis. This is not an unusual story for women. We are too strong for our own good.

Opinie: Werkgevers, houd rekening met menstruatiecyclus van vrouwelijke werknemers De schommelingen in de vrouwencyclus hebben een biologische oorsprong die miljoenen jaren oud is. Toch is onze samenleving zo ingericht dat alleen een constant tempo en constante prestaties worden bel...

Opinie: Werkgevers, houd rekening met menstruatiecyclus van vrouwelijke werknemers
www.volkskrant.nl/columns-opin...

The 60 minutes story on deportations to cecot.

Controls on brGDGT Production in the Seasonally Anoxic Water Column and Sediments of Rotsee (Lake Rot) MBT'5ME values in Rotsee are influenced by lake stratification while the isomer ratio (IR) more directly reflects epilimnion temperature MBT'5ME and IR are strongly correlated, providing a diagno...

Here is a paper led by a former PhD student and which further shows that indicators based on bacterial tetraether lipids in lakes consistently need refinement:
doi.org/10.1029/2025...
With @nemiahladd.bsky.social and @cindydejonge.bsky.social
#brGDGTs #TeamBacteria
🧪 ⚒️ 👩‍🔬
Implications for #PaleoSky

Diving through the purple sulfur bacteria layer of Fayetteville Green Lake with our ROV last month. This is the most intense density of PSB that I've seen in many years!

True horror

Oh man, wat is dit gênant.

Het duidelijkste stemadvies ooit.

It's not often that a senior professorship in paleolimnology comes long, but here is one great opportunity. Deadline September 10. If you consider applying and wonder what the process is like, feel free to reach out to me! www.queensu.ca/vpr/crc/oppo...

WE NEED YOUR HELP‼️ One SR activist in the Netherlands took action against aviation’s climate toll. They remind us: our movement is working—but we need funding to keep pushing for change. 🔥 Link to donate tiny.cc/srdonation

#ScientistRebellion #StoriesFromScientistRebels #FundraisingThroughStories

Comic. [3-column table with headers Period, My Favorite Part, and My Biggest Complaint] [Row 1] P: *Precambrian*, MFP: Life develops, MBC: Snowball Earth episodes [Row 2] P: Cambrian, MFP: Trilobites!, MBC: Evolution could stand to calm down a little [Row 3] P: Ordovician, MFP: Earth might have had rings, MBC: Scary volcanic eruption in North America [Row 4] P: Silurian, MFP: First land animals, MBC: Earth’s newfound mold problem [Row 5] P: Devonian, MFP: Big mountains in Boston, MBC: Yeah, sure, what those giant killer fish needed was *armor* [Row 6] P: Carboniferous, MFP: Cool forests, MBC: Bugs too big [Row 7] P: Permian, MFP: Pangea, MBC: Google “The Great Dying” [Row 8] P: Triassic, MFP: Tanystropheus [dinosaur with extremely long neck next to tiny person for scale], MBC: Damage to Canada still visible from space at Manicouagan [Row 9] P: Jurassic, MFP: Birds, MBC: Parasitoid wasps [Row 10] P: Cretaceous, MFP: Raptors, MBC: Raptors [Row 11] P: Paleogene, MFP: Pretty horseys!!!, MBC: Paleocene-eocene thermal maximum [Row 12] P: Neogene, MFP: Forests of *Dracaena* Dragonblood Trees, MBC: Zanclean Flood [Row 13] P: Quaternary, MFP: Burrito invented, MBC: Whoever picked this name for the third period of the Cenozoic

Geologic Periods

xkcd.com/3120/

The lack of action by our collective governments is insufferable and painfull. And it seems they cannot be swayed by protest etc. We must all work hard to get better people elected. People that still have a soul and conscience.

Open position for PhD student / Postdoc in biogeochemistry For a fully funded four-year project exploring environmental and ecological dynamics in the Mediterranean and Red Sea, we seek a top tier PhD student or postdoc. The project aims to understand the formation and persistence of biodiversity hotspots, especially in light of global climate change and local stressors. The ultimate goal is to gather insights across different organizational levels, from molecular, organismal, and community to habitat structure and biogeochemical pathways, in order to construct comprehensive models that forecast the future dynamics and fate of these ecosystems under changing conditions. This position would be focused on a key aspect of this project – the variability of seafloor fluxes and their interaction with the microbial community to facilitate the habitability of shallow (up to 40 m) and mesophotic (up to 200 m) biodiversity hotspots such as reefs. Interested candidates, please contact by email Dr. Or Bialik (obialik@ocean.org.il) or Prof. Eyal Rahav (eyal.rahav@ocean.org.il) with a letter of motivation, CV, and contact details of at least one referee for this post not later than the 28th of August 2025.

I have a fully funded open #position for a PhD student/postdoc in marine #biogeochemistry. As part of the MARBEDS project, we are seeking someone to study seafloor fluxes and their interactions with microbial communities in biodiversity hotspots.
🧪⚒️🌊
Contact me if you want more details.

Assistant Professor (Tenure Track) of Soil Chemistry

🇨🇭The #ETH in #Zürich is looking for an Assistant Professor in #Soil (Bio-/Geo-) Chemistry!

Deadline to apply is September 30th!

Please Share!

#AcademicSky #Biochemistry #biogeochemistry #soilscience

ethz.ch/en/the-eth-z...

International shame😡

[Person with ponytail wearing lab coat hands balloon to another person in front of a springboard, a magnet hanging from above, and then a target] PERSON WITH PONYTAIL to Person 2: Rub this balloon against your head, then go jump past that magnet toward the target on the wall. [caption] Before the bathroom scale was invented, the only way to weigh people was mass spectrometry.

Mass Spec

xkcd.com/3094/

Opinie: ‘Verenigingen zijn stille kracht achter zwemvaardigheid’ Onlangs stuurde staatssecretaris Karremans een brief naar de Tweede Kamer over zwemmen. Hayke Veldman van de KNZB stelt dat het initiatief lof verdient. Er ontbreek echter één onderdeel: de zwemvereni...

Ode aan de zwemclub💙

Opinie: ‘Verenigingen zijn stille kracht achter zwemvaardigheid’

www.ad.nl/opinie/opini...

Bent u een kleuter? Deel 2.

73% of mothers with kids under 18 are in the workforce. More than flowers or brunch moms need: paid family leave, equal pay, and universal childcare. (But get your mom flowers too)

Happy Mother's Day! 💐

you know the rules.