Sign in

Nagissa Mahmoudi

@nagissa.bsky.social
6.9K followers 1K following 318 posts

Associate Professor at McGill University 🇨🇦 Interested in what microbes eat in the ocean and why. #microbes #carbon #biogeochemistry. www.geomicromcgill.com

PostsRepliesMedia
Reposted by Nagissa Mahmoudi
Anthony Ricciardi @ecoinvasions.bsky.social · 26/09/2026
OTD in 1962, Silent Spring was published. “Nature has introduced great variety into the landscape, but man has displayed a passion for simplifying it. Thus he undoes the built-in checks and balances by which nature holds the species within bounds.” ― Rachel Carson, Silent Spring
Rachel CarsonThe front cover of Silent Spring.
26037
Reposted by Nagissa Mahmoudi
Harvard_MCB @harvardmcb.bsky.social · 25/09/2026
Tenure-Track Professor in Life Science and AI 🔬 🧠 🧪🧬 #AcademicSky #higherEd #MLSky www.mcb.harvard.edu/department/n... @neurovenki.bsky.social @naoshigeuchida.bsky.social@harvard.edu @mitpress.bsky.social @kempnerinstitute.bsky.social @harvardbrainsci.bsky.social
mcb.harvard.edu
Tenure-Track Professor in Life Science and AI - Harvard University - Department of Molecular & Cellular Biology
The Life Sciences Departments in Harvard Faculty of Arts and Sciences seek to recruit a tenure-track professor whose research is at the interface of AI and life sciences, […]
0106
Reposted by Nagissa Mahmoudi
Max Kozlov @maxkozlov.bsky.social · 25/09/2026
SCOOP: Top researchers at Columbia, Stanford, and others thought they were elected to elite scientific societies alongside Nobel laureates. The catch? The organizations are a sham. I spent the last month diving deep into a massive academic scam spanning continents, for @nature.com
nature.com
Exclusive: Sham scientific societies are misleading star researchers
A Nature investigation reveals a network of organizations that have been building their ranks through deceptive practices.
10309186
Reposted by Nagissa Mahmoudi
Nagissa Mahmoudi @nagissa.bsky.social · 18/09/2026
We are hiring TWO new faculty members in Earth & Planetary Sciences at McGill! 🌎 We’re looking for new colleagues in: ⛏️ Critical Minerals for Sustainability 🌋 Solid Earth Processes If either is a good fit for you, please apply! Deadline is October 1. www.mcgill.ca/eps/about-us...
mcgill.ca
Employment Opportunities
Current Openings Join our extraordinary and diverse department! Tenure-track appointment in Critical Minerals for Sustainability Department of Earth and Planetary Sciences, McGill University (www.m...
2610
Reposted by Nagissa Mahmoudi
Kumaran Ramamurthi @ramamurthilab.bsky.social · 18/09/2026
Folks have known for years that adding magnesium to media rescues the lethality of deleting many 'essential' genes, but why? @eswaralab.bsky.social and @subtisilly.bsky.social say that free iron builds up in these mutants. Mg2+ mitigates this by redirecting metabolism towards limiting ROS production
04012
Nagissa Mahmoudi @nagissa.bsky.social · 18/09/2026
We are hiring TWO new faculty members in Earth & Planetary Sciences at McGill! 🌎 We’re looking for new colleagues in: ⛏️ Critical Minerals for Sustainability 🌋 Solid Earth Processes If either is a good fit for you, please apply! Deadline is October 1. www.mcgill.ca/eps/about-us...
mcgill.ca
Employment Opportunities
Current Openings Join our extraordinary and diverse department! Tenure-track appointment in Critical Minerals for Sustainability Department of Earth and Planetary Sciences, McGill University (www.m...
2610
Reposted by Nagissa Mahmoudi
Mark Carney @mark-carney.bsky.social · 17/09/2026
Canada is building a deeper alliance with the EU so that we may write our own futures — with our values, and our ambitions.
20356431067
Reposted by Nagissa Mahmoudi
Faith Kearns, Ph.D. @fkearns.bsky.social · 04/09/2026
This is brutal to read captimes.com/news/educati...
captimes.com
UW-Madison students, records detail investigation of professor
Dietram Scheufele resigned after investigators determined he had sexual relationships with two students and engaged in unwelcome sexual conduct with one.
2134
Reposted by Nagissa Mahmoudi
Justin Chandler @justinchandler.work · 22/04/2026
CBC News is hiring to staff the upcoming Peel bureau, which will cover Brampton, Mississauga and Caledon. See here: www.cbc.ca/news/canada/...
cbc.ca
Apply now for a job in journalism | CBC News
As part of our commitment to local news, CBC News hiring several journalists to help launch our new station in Peel region to serve the rapidly growing communities of Brampton, Mississauga and Caledon...
037
Reposted by Nagissa Mahmoudi
Allen Collins @agcollins.bsky.social · 22/04/2026
Remember that Golden Orb? #MarineLife is cool, and Exploration is key to learning the stories of species, every one of which is fascinating. with @echinoblog.bsky.social @megdaly.bsky.social @abcollens.bsky.social and others. www.noaa.gov/news/scienti...
noaa.gov
Scientists reveal identity of mysterious ‘golden orb’ collected during NOAA expedition
A two-and-a-half-year-old mystery of the "golden orb," an unidentified object that captured significant public interest when it was collected during a 2023 NOAA expedition, has finally been solved. Sc...
43915
Reposted by Nagissa Mahmoudi
Yashar Ali 🐘 @yasharali.bsky.social · 20/04/2026
Absolutely incredible. NASA Astronaut Reid Wiseman, who commanded Artemis II, took this footage from the far side of the Moon with his iPhone. Watch with sound on.
308159504730
Reposted by Nagissa Mahmoudi
Michael E. Mann @michaelemann.bsky.social · 14/04/2026
This may be the stupidest climate denial talking point of all time
65578172
Reposted by Nagissa Mahmoudi
Jesse Shapiro @bjesseshapiro.bsky.social · 14/04/2026
Join us in Montreal for the Canada/US Northeast hub! I will give a talk and @gmdouglas.bsky.social @nagissa.bsky.social & Tim Blower will surely give *great talks* Opportunities for student talks and posters and a good time guaranteed!
096
Reposted by Nagissa Mahmoudi
Reinier Egas @raegas.bsky.social · 14/04/2026
Grab a coffee and enjoy reading up on CO metabolism in methanotrophs! Freshwater ANME (own work): www.nature.com/articles/s41... Marine ANME (@Orphan lab): www.nature.com/articles/s41... Big thanks to our collaborators at QUT! @sjmcilroy.bsky.social (Heyu/Andy/Gene!) @cuwelte.bsky.social
nature.com
Carbon monoxide metabolism in freshwater anaerobic methanotrophic archaea - Nature Communications
Anaerobic methane-oxidizing archaea mitigate methane emissions in anoxic environments. Here, Egas et al. show that these microbes can also oxidize carbon monoxide, prompting re-evaluation of their cla...
23722
Reposted by Nagissa Mahmoudi
Forbes @forbes.com · 13/04/2026
Now 14 months in, Canada’s rejection of the U.S. is the most successful tourism boycott in memory.
forbes.com
Canadians Visiting U.S. By Car Down 35% In 2 Years
Now 14 months in, Canada’s rejection of the U.S. is the most successful tourism boycott in memory.
806128973685
Reposted by Nagissa Mahmoudi
NASA Artemis @artemis.extwitter.link · 11/04/2026
"Planet Earth: You. Are. A. Crew." Artemis II mission specialist Christina Koch reflects on what it means to be a "crew."
19507147
Reposted by Nagissa Mahmoudi
canaztekin.bsky.social @canaztekin.bsky.social · 10/04/2026
🚨 Why can’t mammals regenerate limbs like frog tadpoles or salamanders? In our new paper in @science.org , we show that species-specific oxygen sensing acts as a gatekeeper for initiating limb regeneration 🐭🐸 🔗 www.science.org/doi/10.1126/... #EvoDevo
science.org
Species-specific oxygen sensing governs the initiation of vertebrate limb regeneration
Why mammals cannot regenerate limbs like amphibians do presents a long-standing puzzle in biology. To uncover the underlying differences, we compared amputation responses of embryonic mouse (Mus musculus) and Xenopus laevis tadpole limbs. Lowering ...
21270115
Reposted by Nagissa Mahmoudi
Katie Mack @astrokatie.com · 07/04/2026
#Artemis II lunar flyby images are showing up! 😍 A crescent Earth setting behind the Moon.
Earthset captured through the Orion spacecraft window at 6:41 p.m. EDT, April 6, 2026, during the Artemis II crew’s flyby of the Moon. A muted blue Earth with bright white clouds sets behind the cratered lunar surface. The dark portion of Earth is experiencing nighttime. On Earth’s day side, swirling clouds are visible over the Australia and Oceania region.  In the foreground, Ohm crater has terraced edges and a flat floor interrupted by central peaks. Central peaks form in complex craters when the lunar surface, liquefied on impact, splashes upwards during the crater’s formation.
[alt text from NASA]
353790876
Reposted by Nagissa Mahmoudi
STCmicrobeblog @stcmicrobeblog.bsky.social · 23/03/2026
Cultivating the Ancestors… in Motion What electron microscope images hint at, but can only be seen in videos: how 'Asgard' archaea move.
smallthingsconsidered.blog
Cultivating the Ancestors… in Motion
What electron microscope images hint at, but can only be seen in videos: how 'Asgard' archaea move.
01810
Reposted by Nagissa Mahmoudi
Ben J Woodcroft @benjwoodcroft.bsky.social · 23/03/2026
New paper in mSystems! 🧵 - how much of your metagenome is actually bacterial/archaeal DNA? For many samples, nobody knows. We built SingleM prokaryotic_fraction (SPF) to answer this, then ran it on >100,000 public metagenomes. 🧬🖥️🦠 Here's what we found 👇 doi.org/10.1128/msystems.01062-25
14828
Reposted by Nagissa Mahmoudi
Dr. Dawn Bowdish @msmacrophage.bsky.social · 22/03/2026
I ❤️ this @theglobeandmail.com piece on @gdwantibiotics.bsky.social. Such a beautiful story about his drive to discover new antibiotics against all odds, a tribute to his global leadership, not to mention the many trainee careers he has launched. So honoured to have been hired by this great man. #AMR
theglobeandmail.com
Canadian researcher Gerry Wright is searching for the next generation of life-saving antibiotics
More than 5 million deaths every year are caused by or linked to superbugs
2184
Reposted by Nagissa Mahmoudi
James Rae @mudwaterclimate.bsky.social · 14/03/2026
Chair in Earth Sciences position @uniofstandrews.bsky.social closing soon - Monday 23 March. Very broad remit, so if you’d like to join our lovely school, and get to live in the super beautiful and friendly wee nation of Scotland, please apply! www.st-andrews.ac.uk/earth-scienc... ⚒️🌊🧪
East Sands beach, St Andrews, in the sunshine (which happens more often than you probably think!)
05634
Reposted by Nagissa Mahmoudi
Gregg Levine @greggjlevine.bsky.social · 09/03/2026
The Iranian girls’ school was hit by a US tomahawk cruise missile. NPR has confirmed the footage.
npr.org
Video appears to show U.S. cruise missile striking Iranian school compound
The seven-second video was released by Iranian state media and directly contradicts statements made by President Trump, who said Iran was responsible for the strike.
392098811
Reposted by Nagissa Mahmoudi
Jennifer Biddle @jenbiddle.bsky.social · 05/03/2026
New paper out! We sat down and compiled all viral work in marine sediments. The water column has been getting a second look for viral interactions, its time for sediment to have the same! journals.asm.org/doi/10.1128/...
journals.asm.org
Viruses in marine sediments: a review of their effect on biogeochemistry and microbial interactions | Applied and Environmental Microbiology
In the ocean, viruses are known to mediate the carbon cycle, keeping dissolved organic carbon (DOC) in the microbial loop and preventing its movement into secondary consumers (1). However, few direct ...
34819
Reposted by Nagissa Mahmoudi
Prof Alessandro Tagliabue @altagliabue.bsky.social · 04/03/2026
Check out our new paper on how temperature modulates the iron requirement of nitrifying bacteria - these guys are critical in the ocean nitrogen cycle as they recycle oxidised forms of N. But to do this they need a lot of iron. 🌊 www.pnas.org/doi/abs/10.1...
pnas.org
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
0103
Nagissa Mahmoudi @nagissa.bsky.social · 04/03/2026
Ahhh yes, the geopolitical version of champagne: if it’s not officially declared, it’s just a sparkling military operation.
061
Reposted by Nagissa Mahmoudi
Pawel Burkhardt @pawelburkhardt.bsky.social · 04/03/2026
Thrilled to share that our preprint has been accepted in Science Advances! Grateful to an incredible team & collaborators. Link: www.science.org/doi/10.1126/... 👏 @annaferraioli.bsky.social @maikekittelmann.bsky.social @msarscentre.bsky.social @erc.europa.eu @hfspo.bsky.social #ctenophores
science.org
The 3D architecture of the ctenophore aboral organ and the evolution of complex integrative centers in animals
The ctenophore aboral organ integrates multimodal sensory signals across distinct cell types.
26817
Reposted by Nagissa Mahmoudi
Shepherd @neolithicsheep.bsky.social · 04/03/2026
If you ever want to read a paper for free and can't find it otherwise, email the lead author and politely ask for a copy. You will not be bothering the person. You will in fact make their whole entire day. I have had scientists get so excited I asked they sent me everything they ever published.
172781985
Reposted by Nagissa Mahmoudi
AGU (American Geophysical Union) @agu.org · 27/02/2026
In collaboration with @aslo.org , @tosoceanography.bsky.social, we thank you for a successful #OSM26! See you at #OSM28 27 February–3 March, Vancouver, Canada 🇨🇦! 📷 Cred: Bianca Otero
0167
Reposted by Nagissa Mahmoudi
19thnews @19thnews.org · 23/02/2026
The trove of files released by the Department of Justice, illuminates Epstein’s deep interest and entrenchment in the scientific community. But the files also underscore how he used his power and money in ways that kept women out of places where they might succeed. bit.ly/4qWgPLz
bit.ly
The boys’ club: How Epstein’s influence shaped the exclusion of women in STEM
In one email, an AI researcher suggested it’s “hard to be brilliant if you are worrying if you look fat or why another woman hates you.”
19662302
Reposted by Nagissa Mahmoudi
Alondra Nelson @alondra.bsky.social · 23/02/2026
The Epstein files document what many women researchers have long experienced but rarely seen laid bare so starkly: exclusion operating behind closed doors, shaping who gets funded, invited, mentored, and taken seriously. How many of these networks, norms, and gatekeepers remain in place?
4745141837
Reposted by Nagissa Mahmoudi
Carl Zimmer @carlzimmer.com · 18/02/2026
Scientists have seen Asgard archaea crawling for the first time. When it comes to the origin of eukaryotes, this is like seeing a feathered dinosaur in the wild. (Video courtesy of Philipp Ralder)
10470136
Reposted by Nagissa Mahmoudi
Carl Zimmer @carlzimmer.com · 18/02/2026
One of the biggest questions in biology is how complex cells evolved about 2 billion years ago. Here's my new story on how scientists are solving the mystery of eukaryotes like us. Gift link: nyti.ms/4qMbo22
A pilot in a submersible vehicle collecting sediments samples in 30 meters of water looking for Asgards (microbial relatives of eukaryotes)
9342105
Reposted by Nagissa Mahmoudi
Emil Ruff @emilruff.bsky.social · 03/02/2026
Come work with us on #darkoxygen as part of the NASA Postdoctoral Fellowship Program. It is an amazing opportunity to get up to 3 years of funding. Deadlines are March 1. and November 1. Happy to discuss your ideas! Details here: zintellect.com/Opportunity/... @mblscience.bsky.social #astrobiology
zintellect.com
Zintellect - National Aeronautics and Space Administration (NASA) - ICAR - OxyMoRon: Understanding dioxygen production and consumption in apparently anoxic environments - 0042-NPP-MAR26-ABProg-Astrobi...
About the NASA Postdoctoral Program The NASA Postdoctoral Program (NPP) offers unique research opportunities to highly-talented scientists to engage in ong
0812
Reposted by Nagissa Mahmoudi
Ross Fitzgerald @jrossfitz.bsky.social · 18/02/2026
Insights into how #Staph aureus adapts to the bovine host by unlocking nutrients from the dairy niche. Great work by Amy Pickering, Jamie Gorzynski and others in the group. Bacterial metabolic remodeling by convergent evolution after a host switch.|Science Advances www.science.org/doi/10.1126/...
science.org
Bacterial metabolic remodeling by convergent evolution unlocks nutrient availability after a host switch
Staphylococcus aureus has undergone metabolic remodeling to adapt to the dairy niche.
02915
Reposted by Nagissa Mahmoudi
Royal Society Publishing @royalsocietypublishing.org · 16/02/2026
We are thrilled to announce that, thanks to the support of our institutional subscribers, all Royal Society subscription journals will be open access in 2026 through #S2O. Researchers can read all articles and publish #OpenAccess in our eight subscription journals for free buff.ly/4Lu9VpW
17234
Reposted by Nagissa Mahmoudi
Greg Dick @greatlakesgreg.bsky.social · 16/02/2026
you don't have to be in the water to be exposed to toxins in cyanobacterial blooms: new work from Greg Boyer's group at the Great Lakes Center for Freshwaters and Human Health www.tandfonline.com/doi/full/10....
tandfonline.com
Potential cyanotoxin exposure while recreating during cyanobacterial harmful algal blooms, and possible exposure mitigation
Beale CF, Wei B, Boyer GL, Wigdahl-Perry CR, Yokota K. 2026. Potential cyanotoxin exposure while recreating during cyanobacterial harmful algal blooms, and possible exposure mitigation. Lake Reserv...
096
Reposted by Nagissa Mahmoudi
Mauri Pelto @mauri-pelto.bsky.social · 11/02/2026
We celebrate International Day of Women and Girls in Science as the North Cascade Climate Project expeditions have been mainly powered by women in the last decade. We are artists and scientists, mostly doing both aspects during the field season. Toughness , collaboration and joy is the net result.
0112
Reposted by Nagissa Mahmoudi
Alexandra Witze @alexwitze.bsky.social · 06/02/2026
Sorry for the preview pic in your feed, but we've posted a thoughtful story by @dangaristo.bsky.social that delves into the tangled web of relationships between Jeffrey Epstein and various scientists: www.nature.com/articles/d41...
nature.com
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.
24296125
Reposted by Nagissa Mahmoudi
Dr. Katja Thieme (she/they) @katjathieme.bsky.social · 31/01/2026
Academics vying for a spot in Epstein‘s world. There are so many. I feel the need to make a thread, so I don’t keep confusing them. 1/
7529021423
Reposted by Nagissa Mahmoudi
Woods Hole Oceanographic Institution @whoi.edu · 31/01/2026
🤔What does it take to develop safe and effective marine carbon dioxide removal strategies? Find out from @nytimes.com, whose reporters joined our EPA-approved ocean alkalinity enhancement test in the Gulf of Maine last summer. 📲Read the gift article: go.whoi.edu/oae-nyt 📸 by Sebastian Zeck
1176
Reposted by Nagissa Mahmoudi
Jonathan Eisen @phylogenomics.bsky.social · 31/01/2026
Well, I am in the Epstein Files ... www.justice.gov/epstein/file...
5302
Nagissa Mahmoudi @nagissa.bsky.social · 31/01/2026
I did not expect to see a scientist proposing research in the #Epstein files that sought funding to “link sexual behavior to microbial diversity”.
020
Reposted by Nagissa Mahmoudi
Bob Kopp @bobkopp.net · 30/01/2026
@agu.org has a tool to help you submit a comment to NSF on the importance of NCAR: agu.quorum.us/campaign/154... #SaveNCAR
agu.quorum.us
Share your comments on NCAR with NSF
Tell NSF the future that you want for NCAR by 13 March
17470
Reposted by Nagissa Mahmoudi
European Geosciences Union (EGU) @egu.eu · 28/01/2026
🚨 #JobAlert #EGU is currently seeking a full-time, permanent #IT Specialist, based in the Executive Office in Munich, Germany. 📆 Start date: IMMEDIATE. 👉 Learn more and Apply NOW: egu.eu/5OQO8J 📸: Shailendra Pratap on imaggeo.egu.eu
Image description: A spider on a green background. Text reading:'' EGU logo now hiring IT specialist Apply Today' and the email 'vacancy@egu.eu' detailed at the bottom.''
154
Reposted by Nagissa Mahmoudi
U15 Canada @u15ca.bsky.social · 26/01/2026
We are saddened to learn of the passing of the Hon. Kirsty Duncan. A respected scientist and tireless champion of research in Canada, she leaves a lasting legacy through her leadership and advocacy, including her service as Minister of Science. Our condolences to her friends and family.
02610
Reposted by Nagissa Mahmoudi
Marisa Kabas @marisakabas.bsky.social · 24/01/2026
ICE executed Alex Pretti. Anything else you’re told is a lie.
592318713
Nagissa Mahmoudi @nagissa.bsky.social · 22/01/2026
So proud and happy to see my friend and fellow Earth Scientist, Marena Lin, running for congress in California. Please donate if you can! www.marenalinforcongress.com @marenalinforcongress.com
marenalinforcongress.com
Marena Lin for Congress
Marena Lin is running for Congress in California's 32nd Congressional District.
0101
Reposted by Nagissa Mahmoudi
Tim Ellis, TDSB Ward 2 candidate 🍁 @djdynamic.ca · 20/01/2026
If you are curious how engaged Canada is, they are broadcasting Carney's speech in full in my local pizza shop and playing highlights in my local bank. I'm going to the grocery store next and we'll see if it's running there too lol
A photo of a large TV on the wall of a pizza shop. It's displaying Canadian prime minister Mark Carney speaking at the world economic forum.
1552985
Reposted by Nagissa Mahmoudi
Daniel Munro @dkmunro.bsky.social · 20/01/2026
Really an excellent speech that offers a clear-headed analysis and way forward. Let’s hope the values and strategy it articulates actually show up in concrete policies, programs and diplomacy.
0174