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John Rennie

@johnrennie

Science writer/editor | Frmrly of Quanta Magazine, Scientific American, TWC's Hacking the Planet & more | Faculty: NYU SHERP. | Friend to those who have no friends; enemy to those who make me an enemy. (he/him) ๐Ÿงช๐Ÿฅ‹๐Ÿฆฎ| JohnRennie.net

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Latest posts by John Rennie @johnrennie

A war that isn't a war, documented with videos that may or may not be real, funded by elected leaders who are neither for nor against it, is the most dystopian thing that's happened in my lifetime

05.03.2026 00:59 ๐Ÿ‘ 4252 ๐Ÿ” 1029 ๐Ÿ’ฌ 33 ๐Ÿ“Œ 31

Like, these guys all could have absolutely turned around and then voted to give Trump the green light to wage all the war he wants. But none of them wanted to actually be on record in support of it. Instead, they're going to hide behind this BS, instead.

04.03.2026 22:45 ๐Ÿ‘ 340 ๐Ÿ” 28 ๐Ÿ’ฌ 5 ๐Ÿ“Œ 0

Absolutely ridiculous that Republicans (minus Paul, plus Fetterman) all lined up to defend Trump's ability to do an end-run around Congress and just start a war unilaterally. Cowards.

04.03.2026 22:34 ๐Ÿ‘ 2065 ๐Ÿ” 386 ๐Ÿ’ฌ 29 ๐Ÿ“Œ 14
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Balint to Noem: "You're the secretary of DHS -- for now. And you think you're immune from accountability. But I promise you this: one day he is not gonna be president anymore. And when that day comes, we will still be here. And in hearings like this, we are going to continue to prove your guilt."

04.03.2026 19:13 ๐Ÿ‘ 28182 ๐Ÿ” 7521 ๐Ÿ’ฌ 1136 ๐Ÿ“Œ 682
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Here are 4 districts the TX GOP gerrymandered to gain seats in November, with the Dem and GOP primary vote. Dems outvoted GOPs in every one of them.

04.03.2026 12:02 ๐Ÿ‘ 759 ๐Ÿ” 194 ๐Ÿ’ฌ 16 ๐Ÿ“Œ 53

Kristi Noem is stealing your tax dollars.

Call your Senators and House Rep and demand that she be impeached.

04.03.2026 19:53 ๐Ÿ‘ 61 ๐Ÿ” 17 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

You can always tell the difference between the legislator who is just reading questions put together for them by staff, and one who understands the subject and knows what they're asking.

04.03.2026 19:47 ๐Ÿ‘ 561 ๐Ÿ” 89 ๐Ÿ’ฌ 12 ๐Ÿ“Œ 0
In a long tweet about Anthropic, Pete Hegseth, through the offical "SecWar" Twitter account says "the Department of War must have full, unrestricted access to Anthropicโ€™s models for every LAWFUL purpose in defense of the Republic."

In a long tweet about Anthropic, Pete Hegseth, through the offical "SecWar" Twitter account says "the Department of War must have full, unrestricted access to Anthropicโ€™s models for every LAWFUL purpose in defense of the Republic."

Hegseth is wholeheartedly endorsing the core premise of fascism: industry, as part of the private sphere, must be subordinated to the military objectives of the state.

27.02.2026 23:11 ๐Ÿ‘ 2590 ๐Ÿ” 866 ๐Ÿ’ฌ 79 ๐Ÿ“Œ 52
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Paramount-Warner Would Create a Hollywood Jobs Apocalypse - The American Prospect The deal comes complete with so much debt that it would almost certainly lead to mass job loss. That could prove to be an argument against the deal in court, too.

"The deal is tied up with so much debt that it virtually guarantees layoffs the likes of which Hollywood hasnโ€™t seen before." prospect.org/2026/03/02/p...

02.03.2026 14:27 ๐Ÿ‘ 206 ๐Ÿ” 58 ๐Ÿ’ฌ 4 ๐Ÿ“Œ 15
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One of my favourite sides of politics/media.

02.03.2026 10:20 ๐Ÿ‘ 13393 ๐Ÿ” 4256 ๐Ÿ’ฌ 131 ๐Ÿ“Œ 174

This stuff โ€” the astroturf fake Dem groups, cancelling peopleโ€™s IDs and threatening jail if you keep the paperwork that correctly genders you, the attacks on trans kids playing school sports โ€” are all disgusting, and a playbook we saw a decade ago to prop up the last fascist Republican president.

26.02.2026 17:05 ๐Ÿ‘ 3 ๐Ÿ” 3 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Anyone found to have improperly used a restroom or other private space in a government building would face a written warning for a first violation. A second violation would carry a $1,000 fine, and each subsequent violation would be a misdemeanor offense punishable by another fine and up to six months in jail.
Anyone who believes someone used the wrong restroom in their presence could file a complaint seeking $1,000.
"This whole deputization thing โ€” it turns Kansas residents into Dog the Bounty Hunter," Lawson said. "So now I have to worry about people watching me walk into the ladies' room, and then oh, they're going to call in a $1,000 bounty on me. That is just so, so wrong on so many levels.

Anyone found to have improperly used a restroom or other private space in a government building would face a written warning for a first violation. A second violation would carry a $1,000 fine, and each subsequent violation would be a misdemeanor offense punishable by another fine and up to six months in jail. Anyone who believes someone used the wrong restroom in their presence could file a complaint seeking $1,000. "This whole deputization thing โ€” it turns Kansas residents into Dog the Bounty Hunter," Lawson said. "So now I have to worry about people watching me walk into the ladies' room, and then oh, they're going to call in a $1,000 bounty on me. That is just so, so wrong on so many levels.

In addition to its draconian measure on drivers licenses, the state of Kansas is offering $1,000 bounties to citizens who want to report that a transgender person is using the โ€œwrongโ€ bathroom.

amp.kansascity.com/news/politic...

26.02.2026 14:14 ๐Ÿ‘ 172 ๐Ÿ” 103 ๐Ÿ’ฌ 23 ๐Ÿ“Œ 24
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New A.C.A. Plans Could Increase Family Deductibles to $31,000

After a decade of dithering, the Trump admin has outlined a plan to change Obamacare. And it is to make the coverage exponentially worse and send out of pocket costs to the moonโ€”essentially to make it not health insuranceโ€”in the name of lowering premiums a little. www.nytimes.com/2026/02/26/h...

26.02.2026 13:45 ๐Ÿ‘ 739 ๐Ÿ” 354 ๐Ÿ’ฌ 40 ๐Ÿ“Œ 59

They are so insane and incompetent that I'm wondering if i could join ICE and then just stay home and collect paychecks without anyone noticing

26.02.2026 15:31 ๐Ÿ‘ 3 ๐Ÿ” 1 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

this is extremely fucking important, esp with what just happened in kansas. they are trying to criminalize every aspect of our existence. i try not to be alarmist about things but this is where we are and it is BAD bad

26.02.2026 15:18 ๐Ÿ‘ 945 ๐Ÿ” 696 ๐Ÿ’ฌ 6 ๐Ÿ“Œ 5

Very cool that my power bill has increased by 50% to pay for the grotesque consumption from data centers using technology that stole the work of millions of people, including myself, to put millions of people out of work

If this happened in a cyberpunk story I'd be like "Okay, dial it down a notch"

26.02.2026 13:58 ๐Ÿ‘ 299 ๐Ÿ” 91 ๐Ÿ’ฌ 5 ๐Ÿ“Œ 3

This is consistent with what weโ€™ve found in our polling - term limits for Supreme Court justices are extremely popular and enjoy bipartisan popular suppprt

Dare I say it? With the right kind of elite alignment, it could even be โ€œamendment-levelโ€ popular support (still unlikely)

26.02.2026 15:02 ๐Ÿ‘ 62 ๐Ÿ” 17 ๐Ÿ’ฌ 5 ๐Ÿ“Œ 1
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America was winning the race to find Martian life. Then China jumped in. The Mars Sample Return mission got off to a promising start, hunting for potentially humanity-changing space rocks. How did it fall off the rails?

Is there life on Mars? For decades, America was in pole position to find out with its multi-mission Mars Sample Return program.

But MSR is now officially dead. And in the race to find alien life on Mars, itโ€™s now Chinaโ€™s to lose.

Me @technologyreview.com www.technologyreview.com/2026/02/26/1...

26.02.2026 13:21 ๐Ÿ‘ 51 ๐Ÿ” 14 ๐Ÿ’ฌ 4 ๐Ÿ“Œ 9
26.02.2026 09:45 ๐Ÿ‘ 11307 ๐Ÿ” 3187 ๐Ÿ’ฌ 62 ๐Ÿ“Œ 42
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Study: Dolly Parton is the Greatest Everything is terrible, obviously, and I have been getting particularly fed up with the general state of literacy Iโ€™m seeing in the world. And considering that for some reason my video about the Foโ€ฆ

For what is apparently the 10,001st post on Skepchick (and my own 3,000th), it's a HAPPY STORY of how scientists have shown that Dolly Parton is substantially improving literacy rates around the world through her Imagination Library ๐Ÿงช skepchick.org/2026/02/stud...

26.02.2026 16:03 ๐Ÿ‘ 485 ๐Ÿ” 144 ๐Ÿ’ฌ 12 ๐Ÿ“Œ 15
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New A.C.A. Plans Could Increase Family Deductibles to $31,000

Republicans: great news we have a new healthcare plan that bills you every month and ALSO allows you to pay the full cost of any treatment

People : so whats our benefit

Republicans : what do you mean your benefit

26.02.2026 16:05 ๐Ÿ‘ 315 ๐Ÿ” 131 ๐Ÿ’ฌ 14 ๐Ÿ“Œ 15
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Big Tech Says Generative AI Will Save the Planet. It Doesnโ€™t Offer Much Proof A new report finds that of 154 specific claims about how AI will benefit the climate, just a quarter cited academic research. A third included no evidence at all.

"My problem with claims being made by big tech companies around AI and climate change is not that they're not fully quantified, but that they're relying on hypothetical AI that does not exist now, in some casesโ€ฆโ€ โ€” @drolnick.bsky.social ino.to/BQ1Saun

26.02.2026 16:06 ๐Ÿ‘ 7 ๐Ÿ” 4 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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The major findings are that multiple aspects of a species' ecology shape the tempo of visual perception, which is a highly evolvable trait:

25.02.2026 17:35 ๐Ÿ‘ 10 ๐Ÿ” 4 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Pace of ecology drives the tempo of visual perception across the animal kingdom - Nature Ecology & Evolution Using phylogenetic comparative methods across 237 species from disparate phyla, the authors show that species with fast-paced ecologies have higher temporal resolution of perception.

Pace of ecology drives the tempo of visual perception across the animal kingdom www.nature.com/articles/s41... - new paper with Clinton Haarlem, Cliodhna Hynes and colleagues

Different species see the world as fast as they need to...

24.02.2026 10:40 ๐Ÿ‘ 87 ๐Ÿ” 37 ๐Ÿ’ฌ 4 ๐Ÿ“Œ 1

The assumption that Somalis, who obviously have built their own lives, businesses, and families need white help is just disgusting, naked racism.

These are the values of so much of Twitter's pseudointellectual class.

29.01.2026 03:07 ๐Ÿ‘ 64 ๐Ÿ” 8 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 1

4) And they STILL havenโ€™t released the Epstein files.

29.01.2026 03:11 ๐Ÿ‘ 1281 ๐Ÿ” 470 ๐Ÿ’ฌ 31 ๐Ÿ“Œ 11
29.01.2026 02:04 ๐Ÿ‘ 51 ๐Ÿ” 12 ๐Ÿ’ฌ 4 ๐Ÿ“Œ 0
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Is Particle Physics Dead, Dying, or Just Hard? | Quanta Magazine Columnist Natalie Wolchover checks in with particle physicists more than a decade after the field entered a profound crisis.

First column for Quanta Magazine's new essay section, Qualia.

I take stock of particle physics, a field in crisis. What happened, and what now? Commentary here from many angles.

Please lmk your thoughts, or any tips or topic ideas I should look into. ๐Ÿ™

www.quantamagazine.org/is-particle-...

27.01.2026 18:13 ๐Ÿ‘ 61 ๐Ÿ” 11 ๐Ÿ’ฌ 9 ๐Ÿ“Œ 7

Nice article from @nattyover.bsky.social about the state of particle physics as a field. Itโ€™s historically been perhaps the highest prestige and most prominent subfield of physics but there are genuine worries about the path forward, as Natalie clearly lays out. ๐Ÿงช

27.01.2026 22:16 ๐Ÿ‘ 33 ๐Ÿ” 12 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 0

Pretti clearly did not brandish his gun. Which means the government is saying he was killed for legally exercising his right to carry.

Itโ€™s as clear-cut a violation of the Second Amendment as I can possibly imagine. And weโ€™re about to see the bulk of the gun rights crowd defend his murder.

24.01.2026 20:55 ๐Ÿ‘ 7399 ๐Ÿ” 1997 ๐Ÿ’ฌ 132 ๐Ÿ“Œ 69