jenskallmeyer.bsky.social

jenskallmeyer.bsky.social

@jenskallmeyer.bsky.social

I lick rocks and drill holes. 🏳️‍🌈, 1st gen. academic, work @gfz.bsky.social, Prof. Of Biogeochemistry @unidue.bsky.social

146 followers138 following458 posts

jenskallmeyer.bsky.social reposted

I love me some Fermi problems! However, there are no good instructions on how to use them in classes. So I wrote it up! If you read this it, you will finally learn the answer to the question 'How much phosphorous is released each day by viruses lysing Prochlorococcus cells?' tinyurl.com/2njt9r8h

jenskallmeyer.bsky.social reposted

Wenn Ihr noch einen Anstoß gebraucht habt, um Euch zivilgesellschaftlich zu engagieren: Heute hab Ihr ihn bekommen. Engagiert Euch in der Jugendarbeit, der Kirche, im Sportverein, der Tafel; tretet einer Partei bei; macht den Vorleseonkel im Kindergarten; (1/2)

jenskallmeyer.bsky.social reposted

An diesem FAZ-Interview mag man einige Leerstellen kritisieren, man mag sich wundern, was unerwähnt bleibt, aber die Fakten des Ökonomen Joachim Ragnitz bezogen auf die West-Ost-Transferleistungen wie auch seine Prognose sind kaum zu widerlegen. Auch dieses Interview wird schäumende Wut bringen

That’s a great opportunity to work on a cool project with lovely collaborators (the geologists are a bit strange sometime though) in an absolutely awesome team!!!!

The Probst Lab@probstlab.bsky.social

We're looking for a Postdoctoral Researcher (f/m/d) for the ERC Synergy project “Archean Park”! 📍 Location: Essen, Germany ⏱ Duration: 36 months (Full-time | EG 13 TV-L) 📅 Start Date: As soon as possible ⏰ Application Deadline: September 2, 2026 www.uni-due.de/karriere/ste...

jenskallmeyer.bsky.social reposted

Ich dachte lange, man könnte eine rational-wissenschaftliche Anleitung richtigen Denkens und Handelns erarbeiten. Mit strukturierten Hinweisen auf Logikfehler und kognitive Verzerrungen. Aber ich komme immer stärker zur Überzeugung, der beste kategorische Imperativ ist: Sei einfach kein Arschloch.

jenskallmeyer.bsky.social reposted

For those who believe Europe can absorb researchers from the US, the ERC Advanced Grant competition that just ended will bring nine (9) researchers from the US to Europe from ALL disciplines combined. The US is on its own.

jenskallmeyer.bsky.social reposted

Man redet heute Leuten ein, dass man Naturgesetze aushebeln kann, wenn man nur ganz fest daran glaubt (klar können wir auf dem Mars leben! und durch Meditation Krebs heilen!), dass gesellschaftliche Regeln hingegen unverrückbar sind (wir können doch keine Milliardäre besteuern, du Dummerchen!).

jenskallmeyer.bsky.social reposted

This years ISSM is in Vienna from Aug 30 - Sept 4, the early bird deadline is 15 June. As a premier conference in subsurface microbiology, the ISSM features exciting sessions and excellent keynote speakers. Spread the word, see you there. issm2026.univie.ac.at #deeplife #microbiome #subsurface

issm2026.univie.ac.atissm conference 2026 vienna 12th issm conference12th ISSM COnference Vienna: Subsurface microbiology plays a critical role in shaping Earth's ecosystems, driving biogeochemical processes, and addressing critical environmental challenges. ISSM provi...

jenskallmeyer.bsky.social reposted

jenskallmeyer.bsky.social reposted

Published! Using thermodynamics, we proposed a new microbial metabolism: CH4 + CO to form acetate. This reaction is exergonic under a wide range of conditions and could potentially fuel life in serpentinizing systems and the deep subsurface. agupubs.onlinelibrary.wiley.com/doi/full/10....

agupubs.onlinelibrary.wiley.comAcetogenic Methane‐Carbon Monoxide Comproportionation: An Exergonic but Unobserved Microbial MetabolismCarbon comproportionation reactions are an underexplored class of carbon redox processes relevant to microbial energy conservation Methane-carbon monoxide comproportionation to acetate is exergon...
Heidi Aronson, PhD@heidi-aronson.bsky.social

We’re back with a new comproportionation metabolism! Here we propose that the reaction of CH4 and CO to form acetate is exergonic could support microbial life in serpentinizing springs, the deep subsurface, and Mars and early Earth hydrothermal fluids. #geomicrobiology #astrobiology #methane 🪐🦠

jenskallmeyer.bsky.social reposted

Replying to @florianaigner.at

Ukraine macht gleich in der ersten Zeile das Thema klar: "green into rust". Beim "great oxidation event" vor ca. 2.5 Milliarden Jahren lernten grüne Cyanobakterien, Photosynthese zu betreiben. Sie erzeugten Sauerstoff, der die Erde mit rötlichem Rost überzog, ähnlich wie am Mars heute. #ESC2026

jenskallmeyer.bsky.social reposted

Incredible drone footage! ⚒️🧪

Eos@eos.org

Wait for it .... 11 seconds and BOOM! Some breathtaking footage from Fuego 🇬🇹 and @boisestate.bsky.social scientists in this great science update on infrasound sensors. eos.org/science-upda...

jenskallmeyer.bsky.social reposted

Notice for users submitting MAGs to INSDC Issue: MAGs submitted to INSDC without taxonomic annotations, typically listed as ‘metagenome’, are not included in GTDB. Examples: www.ncbi.nlm.nih.gov/datasets/gen... What to do: Provide at least a domain-level taxonomic affiliation in the Taxon field.

ncbi.nlm.nih.govGenomeDownload a genome data package including genome, transcript and protein sequence, annotation and a data report

jenskallmeyer.bsky.social reposted

Again looking for (self)nominations of/by grad students and postdocs to give virtual talks (via zoom) in the fall seminar series of MSU's Thermal Biology Institute. Does >not< need to be on thermophiles. Email me!

jenskallmeyer.bsky.social reposted

My research group attended the Philadelphia Undergraduate Research Symposium at #CCP yesterday. What a great event! Job well done for Nicole, Madelyn and Anna presenting their work on #AMD #microbiomes

jenskallmeyer.bsky.social reposted

Falls irgendein Grüner in Berlin glaubt, er oder sie hätte die Wahl in Baden-Württemberg gewonnen: nein. Sollte Cem Özdemir Minischderpräsident werden, wird er es trotz ihnen, nicht wegen ihnen.

jenskallmeyer.bsky.social reposted

Happy Birthday, ICDP! 30 years ago OTD, representatives of the US National Science Foundation (NSA), the Chinese Ministry of Geology and Mineral Resources, the German Federal Ministry of Education, Science, Research and Technology, and the then GeoForschungsZentrum Potsdam (GFZ) ratified a ... 1/4

jenskallmeyer.bsky.social reposted

In addition to the 2 postdoc jobs posted yesterday, we’re recruiting 2 PhD students (environmental microbiology/ molecular ecology) to join us from April. The projects will map microbial populations across niches in bioelectrochemical systems relevant to biomethanation & link them to performance.

fa-eosd-saasfaprod1.fa.ocs.oraclecloud.comTwo fully funded PhD candidate positions in Electromicrobiology (3 years)Application deadline: 4 March 2026 at 23:59 hours local Danish time

jenskallmeyer.bsky.social reposted

⚒️🧪Fiery Mud Volcano Eruption! The Daşmərdan (Dashmardan) mud volcano in Azerbaijan erupted ~16:50 on the 30th Jan 2026. The eruption lasted ~15 mins and was accompanied by a pillar of flame several hundred meters high. Daşmərdan had previous documented eruptions in 1866, 1954, 1976, 1986 and 2011.

jenskallmeyer.bsky.social reposted