Christopher Callahan
@ccallahan45.bsky.social
climate scientist, bicycle cavalry in the war on cars. iuclimateandsociety.com
Happy to have contributed to this new work by June Choi and other Stanford friends:
New paper looks into "The debt burden of tropical cyclones and climate change"
=> across all TC-exposed countries, debt-to-GDP ratios are on average 30% higher due to the cumulative effects of TCs since 1990, while GDP levels are on average 10% lower
eartharxiv.org/repository/v...
=> across all TC-exposed countries, debt-to-GDP ratios are on average 30% higher due to the cumulative effects of TCs since 1990, while GDP levels are on average 10% lower
eartharxiv.org/repository/v...
The debt burden of tropical cyclones and climate change
eartharxiv.org
February 2, 2026 at 11:18 AM
Happy to have contributed to this new work by June Choi and other Stanford friends:
Reposted by Christopher Callahan
So an odd thing here is that if you say "an unidentified man dressed in a Batman costume" your point is to communicate "it is not really Batman" but the problem is that the real Batman, within the fiction of the comic book "Batman", is also, literally, an unidentified man dressed in a Batman costume
An unidentified man dressed in a Batman costume angrily confronted Santa Clara city officials during a joint meeting of the City Council, city authorities, and the Santa Clara Stadium Authority on Monday, using his public comment to condemn the city’s stance on cooperation with ICE.
January 31, 2026 at 9:52 PM
So an odd thing here is that if you say "an unidentified man dressed in a Batman costume" your point is to communicate "it is not really Batman" but the problem is that the real Batman, within the fiction of the comic book "Batman", is also, literally, an unidentified man dressed in a Batman costume
i did some checking and found nothing fwiw
January 31, 2026 at 10:40 PM
i did some checking and found nothing fwiw
"The phone that Pretti had in his hand was a connection to a communal determination to refuse the narcotic of normalization." !!!!
January 29, 2026 at 7:45 PM
"The phone that Pretti had in his hand was a connection to a communal determination to refuse the narcotic of normalization." !!!!
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.
Yeah I think the evidence is just pretty convincing at this point that extreme winter temperatures are warming up/becoming less extreme irrespective of Arctic warming, jet stream meandering, etc
www.science.org/doi/full/10....
www.science.org/doi/full/10....
Models and observations agree on fewer and milder midlatitude cold extremes even over recent decades of rapid Arctic warming
Midlatitude extreme cold events have decreased in severity and frequency over recent decades, in agreement with models.
www.science.org
January 24, 2026 at 2:52 AM
Yeah I think the evidence is just pretty convincing at this point that extreme winter temperatures are warming up/becoming less extreme irrespective of Arctic warming, jet stream meandering, etc
www.science.org/doi/full/10....
www.science.org/doi/full/10....
Some people say there’s a link between Arctic warming and winter weather but we’re pretty far from the strength of evidence we have for other extremes
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
Linking Arctic variability and change with extreme winter weather in the United States
Arctic climate change is a likely cause of recent episodes of extreme winter cold in the United States.
www.science.org
January 24, 2026 at 2:46 AM
Some people say there’s a link between Arctic warming and winter weather but we’re pretty far from the strength of evidence we have for other extremes
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
The Science in the Capital books are also pretty good. They do feature Stan being the most Weird About Gender that he ever gets, so fair warning
January 24, 2026 at 2:32 AM
The Science in the Capital books are also pretty good. They do feature Stan being the most Weird About Gender that he ever gets, so fair warning
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]
Say hello to Dr Robby who is my personal doctor and also my dad
January 20, 2026 at 11:01 PM
Say hello to Dr Robby who is my personal doctor and also my dad
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
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