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Osama Alian

@osamaalien

postdoc geomicrobiologist thinking about ocean hydrothermal vent systems, global geo/ecological processes and the origin of life at NASA JPL

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30.12.2023
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Latest posts by Osama Alian @osamaalien

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Caltech Mourns the Passing of George Rossman (1944–2026) Caltech mineralogist George Rossman (PhD '71) passed away on February 6, 2026.

www.caltech.edu/about/news/c...

Got to know George briefly since I came west, and what a magnificent, gentle, genuine and humble soul he was. I'll never forget geeking out in the mineral gallery one evening, and thinking how his excited curiosity was sincerely youthful and infectious.

11.02.2026 00:52 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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New Deep-Sea Coral Found Living on Nodules Targeted for Mining - environment coastal & offshore An international research team led by Dr. Guadalupe Bribiesca-Contreras from the National Oceanography Centre (NOC) and Senckenberg scientist Dr. Nadia Santodomingo has discovered a new species of deep-sea coral that lives attached to polymetallic nodules

🌊πŸͺΈ Just when they thought the #DeepSea was a barren "desert": scientists find a brand new species clinging to metal #nodules that mining companies want to scoop up πŸ’”πŸ§ͺπŸŒ‘ #DefendTheDeep #StopDeepSeaMining πŸšπŸ’™

27.11.2025 12:20 πŸ‘ 19 πŸ” 10 πŸ’¬ 0 πŸ“Œ 1
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WOW!
An incredible discovery. The first ever image of a baby exoplanet embedded in the dust rings from which planets are forming around a star. Confirms the developing view of planet formation that we’ve never before seen in action.
πŸ§ͺπŸ”­
www.universiteitleiden.nl/en/news/2025...

08.11.2025 03:20 πŸ‘ 218 πŸ” 73 πŸ’¬ 4 πŸ“Œ 7

Just gave this a spin on a paper I've been working on for too long and WOW. Even though it was outside its topic domains, the feedback it highlighted was oh so constructive and insightful. Highly recommended and congrats @odedrechavi.bsky.social and team on an awesome tool!

26.10.2025 20:36 πŸ‘ 12 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0

I still contend that >90% of the benefit of writing a review isn't the audience. It's for the author going through the literature, finding gaps in knowledge, learning how experiments are done, etc. It really isn't about writing a review. It's about doing the review yourself. AI can't do that for you

21.10.2025 17:28 πŸ‘ 82 πŸ” 20 πŸ’¬ 4 πŸ“Œ 2

As night falls on Pasadena today after goodbyes to many colleagues and friends, it's important to remember that while places and their history are important, ideas and inspiration live within people. As a community we shouldn't forget holding strong those ties that nurture optimism and innovation

15.10.2025 05:11 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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GenomeFISH: genome-based fluorescence in situ hybridisation for strain-level visualisation of microbial communities Abstract. Fluorescence in situ hybridisation (FISH) is a powerful tool for visualising the spatial organisation of microbial communities. However, traditio

Very excited to share the first paper out of my Postdoc @CMR:

GenomeFISH: genome-based fluorescence in situ hybridisation for strain-level visualisation of microbial communities.
@sjmcilroy.bsky.social @jamesvolmer.bsky.social @benjwoodcroft.bsky.social

doi.org/10.1093/isme...

🧡1/7

08.07.2025 02:30 πŸ‘ 63 πŸ” 27 πŸ’¬ 4 πŸ“Œ 2
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Guidelines for preventing and reporting contamination in low-biomass microbiome studies - Nature Microbiology In this Consensus Statement, the authors outline strategies for processing, analysing and interpreting low-biomass microbiome samples, and provide recommendations to minimize contaminants.

New Consensus Statement in Nature Microbiology!
Working with low-biomass microbiome samples? From deep subsurface rocks to human lungs, contamination is a major challenge. We offer field-to-data analysis guidelines to help keep your results clean.
πŸ“– doi.org/10.1038/s415...

23.06.2025 16:54 πŸ‘ 47 πŸ” 22 πŸ’¬ 0 πŸ“Œ 3
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Defining ultra-slow-growing extremophilic microorganisms as aeonophiles - Nature Microbiology In environments like the deep subsurface, microorganisms with long doubling times can remain metabolically active for millions of years β€” we propose referring to this class of extremophile as aeonophi...

Defining ultra-slow-growing extremophilic microorganisms as aeonophiles #USC_earth #USC_MEB #jcampubs www.nature.com/articles/s41...

20.06.2025 17:13 πŸ‘ 15 πŸ” 9 πŸ’¬ 0 πŸ“Œ 1
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This, by Michael Lynch.

I'd include AI techbros as well.

www.pnas.org/doi/10.1073/...

31.05.2025 14:28 πŸ‘ 46 πŸ” 19 πŸ’¬ 3 πŸ“Œ 2
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Functional biogeography of marine microbial heterotrophs Heterotrophic bacteria and archaea (β€œheteroprokaryotes”) drive global carbon cycling, but how to quantitatively organize their functional complexity remains unclear. We generated a global-scale unders...

Out in Science! Zakem et al. mechanistically modeled global marine prokaryotic functional diversity, grounded with field data. Shifts in community composition drive respiration and thus biological C storage. This facilitates C cycle projections in a warming ocean
www.science.org/doi/10.1126/...

22.05.2025 22:34 πŸ‘ 53 πŸ” 25 πŸ’¬ 0 πŸ“Œ 0
Diving robot enables complex measurements and analyses

Exciting! We have successfully deployed our in situ mass spectrometer, developed together with @marumunibremen.bsky.social, on their brand new #ROV #MARUM-QUEST 5000. It provides real-time inΒ­formΒ­aΒ­tion on gas conΒ­cenΒ­traΒ­tions in waΒ­ter 400Β°C hot and 4000m deep.

mpi-bremen.de/en/Diving-ro...

21.05.2025 06:30 πŸ‘ 15 πŸ” 8 πŸ’¬ 1 πŸ“Œ 0
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Diel partitioning in microbial phosphorus acquisition in the Sargasso Sea | PNAS The daily cycle of photosynthetic primary production at the base of marine food webs is often limited by the availability of scarce nutrients. Micr...

In the phosphorus-limited Sargasso Sea, microbes partition phosphorus uptake by time of dayβ€”bacteria in the morning, phytoplankton by day, and cyanobacteria at duskβ€”revealing a temporal niche strategy. www.pnas.org/doi/10.1073/...

03.05.2025 17:44 πŸ‘ 16 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0

New paper out!
We discovered a tiny archaeon with the smallest known archaeal genome β€” only 238 kbp!
Candidatus Sukunaarchaeum mirabile has almost no recognizable metabolic pathways and may rely heavily on a host to survive.
It also represents a novel, deep-branching lineage in the archaeal tree.

03.05.2025 05:08 πŸ‘ 82 πŸ” 39 πŸ’¬ 2 πŸ“Œ 4
The crown of a crinoid sits just within smooth grey rock, its arms gently folded over one another as it lays on its side. A partial stalk extends from the bottom of the crinoid's crown (the calyx), appearing as if it's just been separated from the rest of its body.

The crown of a crinoid sits just within smooth grey rock, its arms gently folded over one another as it lays on its side. A partial stalk extends from the bottom of the crinoid's crown (the calyx), appearing as if it's just been separated from the rest of its body.

A cropped image with a closer view of the crinoid's long, tendril-like arms and rounded calyx. Small, feather-like extensions (pinnules) hang from the arms and gently drape over one another.

A cropped image with a closer view of the crinoid's long, tendril-like arms and rounded calyx. Small, feather-like extensions (pinnules) hang from the arms and gently drape over one another.

Happy #FossilFriday, check out this beautifully preserved crinoid! These animals have inhabited the oceans for 480 million years, and they're relatives of sea urchins and sea stars. This specimen is long fossilized, but looks like it just died and fell into the seabed's embrace. (1/3)
#paleontology

07.02.2025 14:04 πŸ‘ 191 πŸ” 42 πŸ’¬ 6 πŸ“Œ 5
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40 years ago all of Genbank was published in print form by NAR. The same format today would require over 4 light seconds of shelf space. To a year of progress in 2025.

29.12.2024 09:50 πŸ‘ 564 πŸ” 216 πŸ’¬ 15 πŸ“Œ 25
A figure from the preprint manuscript showing a phylogenetic tree with the three clases of molybdenum-dependent nitrogenases and their predicted structures

A figure from the preprint manuscript showing a phylogenetic tree with the three clases of molybdenum-dependent nitrogenases and their predicted structures

A screenshot of the preprint title "Nitrogenase structural evolution across Earth's history" by authors Bruno Cuevas-Zuviria, F Detemple, K Amirtkar, AK Garcia, LC Seedfeld, and B KaΓ§ar

A screenshot of the preprint title "Nitrogenase structural evolution across Earth's history" by authors Bruno Cuevas-Zuviria, F Detemple, K Amirtkar, AK Garcia, LC Seedfeld, and B KaΓ§ar

πŸ§ͺ🦠🌍 Nitrogenases are one of the most ecologically important enzymes on Earth. They're ancient too.

In this PREPRINT, Cuevas-ZuvirΓ­a & Co. analyze how their structures tell the story of planetary-wide ecological changes
doi.org/10.1101/2024...

28.12.2024 09:12 πŸ‘ 34 πŸ” 11 πŸ’¬ 1 πŸ“Œ 0
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Flipping FLIP ship saved from scrapyard at last minute The US Navy and Scripps Institution of Oceanography's unique FLoating Instrument Platform (FLIP) has been saved at the last minute from the breaker's yard. Scheduled to be scrapped in Mexico, it was p...

I am so happy that FLIP will live on!

newatlas.com/marine/flipp...

27.11.2024 15:22 πŸ‘ 7 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Evaluation of DNA extraction kits for long-read shotgun metagenomics using Oxford Nanopore sequencing for rapid taxonomic and antimicrobial resistance detection - Scientific Reports Scientific Reports - Evaluation of DNA extraction kits for long-read shotgun metagenomics using Oxford Nanopore sequencing for rapid taxonomic and antimicrobial resistance detection

Useful benchmarking study

'Evaluation of DNA extraction kits for long-read shotgun metagenomics using Oxford Nanopore sequencing for rapid taxonomic and antimicrobial resistance detection'

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

28.11.2024 21:48 πŸ‘ 62 πŸ” 26 πŸ’¬ 0 πŸ“Œ 0

Now that we've had a migration of twitter people here, I figured it's a good time to re-share our most recent work, measuring the growth rates of individual microbial cells with Raman. Super cool technique if you're curious about quantifying microbial activity in/on minerals, plants, etc!

20.11.2024 06:08 πŸ‘ 28 πŸ” 8 πŸ’¬ 0 πŸ“Œ 0

Life finds a way

23.11.2024 03:42 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Histogram peaked at 3 minutes and 2 weeks since sent

Histogram peaked at 3 minutes and 2 weeks since sent

When I will respond to your email

20.11.2024 18:29 πŸ‘ 2062 πŸ” 349 πŸ’¬ 39 πŸ“Œ 86
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If you are not aware, Giant Squid eyes are huge. #marinelife

19.11.2024 17:55 πŸ‘ 215 πŸ” 31 πŸ’¬ 14 πŸ“Œ 4
Apply - Interfolio {{$ctrl.$state.data.pageTitle}} - Apply - Interfolio

Metabolomics folks / mass spectrometrists, are you looking for a cool postdoc opportunity? Dr. Anitra Ingalls @ the Univ. of Washington is hiring a postdoc to work with an international team (including yours truly) on the metabolites of marine critters. Come work with us!
apply.interfolio.com/150110

19.11.2024 19:17 πŸ‘ 16 πŸ” 21 πŸ’¬ 0 πŸ“Œ 1

It's so nice to find the science tribe again πŸ₯²

18.11.2024 22:11 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0