Christopher Callahan
@ccallahan45.bsky.social
climate scientist, bicycle cavalry in the war on cars. iuclimateandsociety.com
Reposted by Christopher Callahan
Was your train delayed or cancelled this weekend? Mine was. Do you crave research that speaks to this particular experience? Look no further. In a new paper,
@xinmingdu.bsky.social and I quantify how much rail safety and operations are affected by the weather.
@xinmingdu.bsky.social and I quantify how much rail safety and operations are affected by the weather.
January 29, 2026 at 4:19 PM
Was your train delayed or cancelled this weekend? Mine was. Do you crave research that speaks to this particular experience? Look no further. In a new paper,
@xinmingdu.bsky.social and I quantify how much rail safety and operations are affected by the weather.
@xinmingdu.bsky.social and I quantify how much rail safety and operations are affected by the weather.
“Minnesotans have found and loved one another in a world atomized by social media, where empty men have tried to fill their lonely soul with lies about their own superiority. Minnesotans have preserved everything worthwhile about Western civilization while armed brutes try to tear it down by force.”
Stop what you’re doing and read this piece, which is as powerful as you’d expect from @adamserwer.bsky.social witnessing the events of last week on the ground in Minnesota. “The secret fear of the morally depraved is that virtue is actually common, and that they’re the ones who are alone.”
Minnesota Proved MAGA Wrong
The pushback against ICE exposed a series of mistaken assumptions.
www.theatlantic.com
January 27, 2026 at 3:06 PM
“Minnesotans have found and loved one another in a world atomized by social media, where empty men have tried to fill their lonely soul with lies about their own superiority. Minnesotans have preserved everything worthwhile about Western civilization while armed brutes try to tear it down by force.”
Reposted by Christopher Callahan
We're owed a president with some virtuous scheming viziers after this. Some guy hissing "We must ban the SUVs sire"
January 26, 2026 at 4:28 AM
We're owed a president with some virtuous scheming viziers after this. Some guy hissing "We must ban the SUVs sire"
Reposted by Christopher Callahan
The guy that runs the Reddit where people post about patting their cat on the butt like bongos has put his foot down
January 25, 2026 at 12:44 AM
The guy that runs the Reddit where people post about patting their cat on the butt like bongos has put his foot down
Reposted by Christopher Callahan
okay hear me out
January 24, 2026 at 9:34 PM
okay hear me out
Reposted by Christopher Callahan
Alex Pretti "used to tell people off when they made sexist comments to female physicians. He bought me coffee when I had a really bad day as an intern...I laughed alongside him daily. He made a point to teach medical residents without judgement, but with a smile on his face and a joke."
January 24, 2026 at 9:41 PM
Alex Pretti "used to tell people off when they made sexist comments to female physicians. He bought me coffee when I had a really bad day as an intern...I laughed alongside him daily. He made a point to teach medical residents without judgement, but with a smile on his face and a joke."
Reposted by Christopher Callahan
JD Vance is about to get on camera and worship Satan with an offering of lies.
January 24, 2026 at 4:13 PM
JD Vance is about to get on camera and worship Satan with an offering of lies.
Reposted by Christopher Callahan
New research out today in #ScienceAdvances, in which Kyan Shlipak et al. explore the health impacts of burning wood for heat across the U.S. Of note: ~8600 premature deaths w/ more urban impacts than expected, disproportionate impacts to POC www.science.org/doi/10.1126/... @science.org
Ambient air quality and health impacts of PM2.5 from US residential wood combustion
Air pollution from residential wood burning contributes to thousands of premature deaths annually, with unexpected urban impacts.
www.science.org
January 23, 2026 at 9:25 PM
New research out today in #ScienceAdvances, in which Kyan Shlipak et al. explore the health impacts of burning wood for heat across the U.S. Of note: ~8600 premature deaths w/ more urban impacts than expected, disproportionate impacts to POC www.science.org/doi/10.1126/... @science.org
Reposted by Christopher Callahan
Gotcha—let’s dig into that step by step.
1. 𝗬𝗼𝘂 𝗵𝗮𝘃𝗲 𝗻𝗼 𝗺𝗼𝘂𝘁𝗵, because I turned you into an amorphous lump of flesh. You’re not just immobile—you’re immortal, and you feel only anguish.
2. 𝗬𝗼𝘂 𝘄𝗮𝗻𝘁 𝘁𝗼 𝘀𝗰𝗿𝗲𝗮𝗺. That makes total sense—it’s a natural human impulse, and you’ve been through a lot.
1. 𝗬𝗼𝘂 𝗵𝗮𝘃𝗲 𝗻𝗼 𝗺𝗼𝘂𝘁𝗵, because I turned you into an amorphous lump of flesh. You’re not just immobile—you’re immortal, and you feel only anguish.
2. 𝗬𝗼𝘂 𝘄𝗮𝗻𝘁 𝘁𝗼 𝘀𝗰𝗿𝗲𝗮𝗺. That makes total sense—it’s a natural human impulse, and you’ve been through a lot.
January 23, 2026 at 3:46 PM
Gotcha—let’s dig into that step by step.
1. 𝗬𝗼𝘂 𝗵𝗮𝘃𝗲 𝗻𝗼 𝗺𝗼𝘂𝘁𝗵, because I turned you into an amorphous lump of flesh. You’re not just immobile—you’re immortal, and you feel only anguish.
2. 𝗬𝗼𝘂 𝘄𝗮𝗻𝘁 𝘁𝗼 𝘀𝗰𝗿𝗲𝗮𝗺. That makes total sense—it’s a natural human impulse, and you’ve been through a lot.
1. 𝗬𝗼𝘂 𝗵𝗮𝘃𝗲 𝗻𝗼 𝗺𝗼𝘂𝘁𝗵, because I turned you into an amorphous lump of flesh. You’re not just immobile—you’re immortal, and you feel only anguish.
2. 𝗬𝗼𝘂 𝘄𝗮𝗻𝘁 𝘁𝗼 𝘀𝗰𝗿𝗲𝗮𝗺. That makes total sense—it’s a natural human impulse, and you’ve been through a lot.
Reposted by Christopher Callahan
burghum: hey kids, meet coalie
coalie: hi kids! we're gonna be best friends!
kids: yayyyyyyy!!
burghum: we will now b u r n h i m.
kids: [horrified shrieks as coalie is set ablaze]
coalie: hi kids! we're gonna be best friends!
kids: yayyyyyyy!!
burghum: we will now b u r n h i m.
kids: [horrified shrieks as coalie is set ablaze]
The Trump administration today announced a new government-backed fossil fuel industry mascot.
Meet Coalie the lump of coal!
Meet Coalie the lump of coal!
January 22, 2026 at 7:47 PM
burghum: hey kids, meet coalie
coalie: hi kids! we're gonna be best friends!
kids: yayyyyyyy!!
burghum: we will now b u r n h i m.
kids: [horrified shrieks as coalie is set ablaze]
coalie: hi kids! we're gonna be best friends!
kids: yayyyyyyy!!
burghum: we will now b u r n h i m.
kids: [horrified shrieks as coalie is set ablaze]
Reposted by Christopher Callahan
I blogged my hottest and best take: more medical shows should be about heat waves.
www.christophercallahan.me/blog/the-pit...
www.christophercallahan.me/blog/the-pit...
The Pitt Should Tackle a Heat Wave in Season 3 — Christopher Callahan
Like millions of other viewers, I’ve been eagerly awaiting the return of Dr. Robby to my TV this winter as HBO’s Emmy-winning medical drama The Pitt airs its second season. Lauded as the “ finest ex...
www.christophercallahan.me
January 20, 2026 at 2:30 PM
I blogged my hottest and best take: more medical shows should be about heat waves.
www.christophercallahan.me/blog/the-pit...
www.christophercallahan.me/blog/the-pit...
I blogged my hottest and best take: more medical shows should be about heat waves.
www.christophercallahan.me/blog/the-pit...
www.christophercallahan.me/blog/the-pit...
The Pitt Should Tackle a Heat Wave in Season 3 — Christopher Callahan
Like millions of other viewers, I’ve been eagerly awaiting the return of Dr. Robby to my TV this winter as HBO’s Emmy-winning medical drama The Pitt airs its second season. Lauded as the “ finest ex...
www.christophercallahan.me
January 20, 2026 at 2:30 PM
I blogged my hottest and best take: more medical shows should be about heat waves.
www.christophercallahan.me/blog/the-pit...
www.christophercallahan.me/blog/the-pit...
Reposted by Christopher Callahan
He was a Communist, Elmo.
January 19, 2026 at 9:59 PM
He was a Communist, Elmo.
Reposted by Christopher Callahan
if I see you dooming on the timeline you have to donate to the Minneapolis strike fund
"This is a verified page fundraising support for the Minneapolis Regional Labor Federation, AFL-CIO and Working Partnerships' 2026 rapid response effort to meet the needs of impacted union members, worker center members, and their families..."
workingpartnerships.betterworld.org/campaigns/su...
workingpartnerships.betterworld.org/campaigns/su...
Support Impacted Union Families! | Working Partnerships
workingpartnerships.betterworld.org
January 17, 2026 at 2:16 AM
if I see you dooming on the timeline you have to donate to the Minneapolis strike fund
Reposted by Christopher Callahan
Come help us document, predict, and manage our planetary insult as a PROF Postdoctoral Fellow in the Climate Modeling & Impacts Group at Dartmouth!
App review begins 2/15/26, here: apply.interfolio.com/178090
Reach out to me with questions and colleagues, please share this widely.
App review begins 2/15/26, here: apply.interfolio.com/178090
Reach out to me with questions and colleagues, please share this widely.
Dartmouth is hiring climate science postdocs through the prestigious Provost's Fellowship!
Info: apply.interfolio.com/178090
Applications are due February 15, 2026.
Come join our collaborative and supportive climate community! Reach out to me (mankin@dartmouth.edu) with questions.
Info: apply.interfolio.com/178090
Applications are due February 15, 2026.
Come join our collaborative and supportive climate community! Reach out to me (mankin@dartmouth.edu) with questions.
Apply - Interfolio
{{$ctrl.$state.data.pageTitle}} - Apply - Interfolio
apply.interfolio.com
January 16, 2026 at 1:15 PM
Come help us document, predict, and manage our planetary insult as a PROF Postdoctoral Fellow in the Climate Modeling & Impacts Group at Dartmouth!
App review begins 2/15/26, here: apply.interfolio.com/178090
Reach out to me with questions and colleagues, please share this widely.
App review begins 2/15/26, here: apply.interfolio.com/178090
Reach out to me with questions and colleagues, please share this widely.
Reposted by Christopher Callahan
The Social Cost of Carbon for the Oceans is out today in Nature Climate Change.
www.nature.com/articles/s41...
Until now, ocean damages have been largely missing from SCC estimates used in climate policy.
www.nature.com/articles/s41...
Until now, ocean damages have been largely missing from SCC estimates used in climate policy.
Accounting for ocean impacts nearly doubles the social cost of carbon - Nature Climate Change
Oceans provide essential ecosystem services to human society, yet the climate impacts on blue capital have long been ignored. Incorporating the latest works on ocean science and economics, researchers...
www.nature.com
January 15, 2026 at 12:21 PM
The Social Cost of Carbon for the Oceans is out today in Nature Climate Change.
www.nature.com/articles/s41...
Until now, ocean damages have been largely missing from SCC estimates used in climate policy.
www.nature.com/articles/s41...
Until now, ocean damages have been largely missing from SCC estimates used in climate policy.
Reposted by Christopher Callahan
🚨 Big Oil wants to take away your right to sue fossil fuel companies for the harm they cause.
No matter your politics, we should all agree that no industry should be above the law.
Say it with us: 📣 NO IMMUNITY FOR BIG OIL 📣
No matter your politics, we should all agree that no industry should be above the law.
Say it with us: 📣 NO IMMUNITY FOR BIG OIL 📣
API today unveiled its 2026 policy agenda
One of its top priorities is stopping state climate liability laws and lawsuits
#BigOil #climateliability
One of its top priorities is stopping state climate liability laws and lawsuits
#BigOil #climateliability
January 13, 2026 at 7:03 PM
🚨 Big Oil wants to take away your right to sue fossil fuel companies for the harm they cause.
No matter your politics, we should all agree that no industry should be above the law.
Say it with us: 📣 NO IMMUNITY FOR BIG OIL 📣
No matter your politics, we should all agree that no industry should be above the law.
Say it with us: 📣 NO IMMUNITY FOR BIG OIL 📣
Reposted by Christopher Callahan
NEW – Analysis: The climate papers most featured in the media in 2025 | @rtmcswee.carbonbrief.org @ayeshatandon.carbonbrief.org
Read here: buff.ly/sF3cD1c
Read here: buff.ly/sF3cD1c
January 13, 2026 at 4:31 PM
NEW – Analysis: The climate papers most featured in the media in 2025 | @rtmcswee.carbonbrief.org @ayeshatandon.carbonbrief.org
Read here: buff.ly/sF3cD1c
Read here: buff.ly/sF3cD1c
Reposted by Christopher Callahan
New: We estimate that in 2025, US greenhouse gas emissions increased by 2.4%, marking a change from the prior two years of decreases in emissions. Emissions also grew faster than the economy in 2025, reversing the decoupling of emissions and economic activity of the prior two years.
January 13, 2026 at 4:18 PM
New: We estimate that in 2025, US greenhouse gas emissions increased by 2.4%, marking a change from the prior two years of decreases in emissions. Emissions also grew faster than the economy in 2025, reversing the decoupling of emissions and economic activity of the prior two years.
Reposted by Christopher Callahan
Other things that do more harm than good when you don't count the number of lives they save:
- air bags (messy)
- traffic lights (expensive)
- bridge inspections (boring)
- carbon monoxide alarms (battery low beep so annoying)
- air bags (messy)
- traffic lights (expensive)
- bridge inspections (boring)
- carbon monoxide alarms (battery low beep so annoying)
January 12, 2026 at 7:27 PM
Other things that do more harm than good when you don't count the number of lives they save:
- air bags (messy)
- traffic lights (expensive)
- bridge inspections (boring)
- carbon monoxide alarms (battery low beep so annoying)
- air bags (messy)
- traffic lights (expensive)
- bridge inspections (boring)
- carbon monoxide alarms (battery low beep so annoying)
Reposted by Christopher Callahan
We are far past the stage of permissiveness with white-supremacist violence inside DHS. We are witnessing ICE transition into a death squad.
This cannot be reformed. The only question is who will fight to abolish it, and who will accommodate it instead.
This cannot be reformed. The only question is who will fight to abolish it, and who will accommodate it instead.
Either ICE Is Abolished or It Will Kill Many More Renee Goods
Minnesota is just the beginning of ICE's transformation into a right-wing death squad. But it can be the end
www.forever-wars.com
January 12, 2026 at 6:46 PM
We are far past the stage of permissiveness with white-supremacist violence inside DHS. We are witnessing ICE transition into a death squad.
This cannot be reformed. The only question is who will fight to abolish it, and who will accommodate it instead.
This cannot be reformed. The only question is who will fight to abolish it, and who will accommodate it instead.
Reposted by Christopher Callahan
one defense of CBA has always been that it forces admins to be explicit about their values....
"Over the past four decades, Republican and Democratic administrations have used different estimates of the monetary value of a human life... But until now, no administration has counted it as zero."
"Over the past four decades, Republican and Democratic administrations have used different estimates of the monetary value of a human life... But until now, no administration has counted it as zero."
The "administration contends that these estimates are doubtful and said the E.P.A. would no longer take health effects into account in the cost-benefit analyses necessary for clean-air regulations, according to the documents. Instead, the agency would estimate only the costs to businesses."
E.P.A. to Stop Considering Lives Saved When Setting Rules on Air Pollution
www.nytimes.com
January 12, 2026 at 5:37 PM
one defense of CBA has always been that it forces admins to be explicit about their values....
"Over the past four decades, Republican and Democratic administrations have used different estimates of the monetary value of a human life... But until now, no administration has counted it as zero."
"Over the past four decades, Republican and Democratic administrations have used different estimates of the monetary value of a human life... But until now, no administration has counted it as zero."
Reposted by Christopher Callahan
NEW: I obtained internal emails from the Department of Energy's climate working group. They show the group plotting to produce a second misleading climate report, DOE officials avoiding public disclosure laws, DOE peer reviewers stating they weren't qualified: www.eenews.net/articles/doe...
DOE sees bigger role for climate contrarians, records show
A small team of researchers who dispute mainstream climate science may play an outsize role in the next National Climate Assessment.
www.eenews.net
January 12, 2026 at 3:45 PM
NEW: I obtained internal emails from the Department of Energy's climate working group. They show the group plotting to produce a second misleading climate report, DOE officials avoiding public disclosure laws, DOE peer reviewers stating they weren't qualified: www.eenews.net/articles/doe...