Margaret Harris
@drmlharris.bsky.social
3K followers 1.8K following 710 posts
Science journalist at Physics World magazine (@physicsworld.bsky.social). Also available as @[email protected]. All views on science, politics, history, nonsense, etc. my own. DM for Signal contact info.
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Reposted by Margaret Harris
paris.nyc
after the 10th radioactive shrimp recall in 7 weeks, i decided to do some digging

little did i know it would lead me to an underreported industrial accident that may have released an airborne plume of radioactive debris over swaths of indonesia
www.consumerreports.org/health/food-...
What Is Really Going on With All This Radioactive Shrimp? - Consumer Reports
Here’s the latest on how shrimp and spices got contaminated with cesium-137, how the FDA has responded, and why consumers should not panic.
www.consumerreports.org
drmlharris.bsky.social
I’m asking whether you’re okay with giving those drugs to kids to treat some conditions and not others. And if you are, then (given the risks are identical either way), I’m asking why.
drmlharris.bsky.social
I’m a big fan of Dar Williams‘ lyrics and I’ve just seen that she has a new album out for the first time since the 2010s, so I think she qualifies.
drmlharris.bsky.social
No. 2 on your list is sometimes done for medical reasons (e.g. preventing early-onset puberty in, like, a 7-year-old) that have nothing to do with kids questioning their gender. Are you okay with it in those circumstances?
drmlharris.bsky.social
Have to admit, I thought this was a close-up of the surface of a Mars bar at first glance...
drmlharris.bsky.social
The prizes are always announced at 11.45am Swedish time or later, and they contact the laureates a little before then. The “Nobel call in the middle of the night” phenomenon is thus entirely due to the recent dominance of US science, as 11.45am in Sweden is 12.45am-5.45am in the US.
drmlharris.bsky.social
My favourite overlap is that Harvard University could have offered Galileo a professorship. And according to some sources, it actually did.
raxkingisdead.bsky.social
you ever think about those real weird overlaps. like tennessee williams might have listened to the ramones
Reposted by Margaret Harris
georgemonbiot.bsky.social
ME/CFS is a devastating condition that has long been denied, dismissed, psychologised and underdiagnosed. Research is at last starting to catch up with it, with glimmers of hope for those who have been left untreated for so long.
There's a huge BUT coming ...🧵
www.theguardian.com/society/2025...
Scientists develop first ‘accurate blood test’ to detect chronic fatigue syndrome
Research could offer hope for ME patients – but some experts urge caution and say more studies needed
www.theguardian.com
Reposted by Margaret Harris
patchenbarss.bsky.social
Question about fiction from a non-fiction writer: I'm trying to think of protagonists who do not have a character arc, who end their story the same as they began. My one candidate: Ferris Bueller, who catalyzes change in others, but does not himself evolve or grow. Any others you can think of?
Reposted by Margaret Harris
physicsworld.bsky.social
Back in 2013, we interviewed one of the newly-announced Nobel laureates in Physics, John Martinis, about his work on quantum computing for our weekly podcast. Listen to it here: physicsworld.com/a/quantum-co... 🧪⚛️ #NobelPrize
Quantum computing: challenges, triumphs and applications – Physics World
Leading experts explain how quantum mechanics could be harnessed to revolutionize computing
physicsworld.com
Reposted by Margaret Harris
physicsworld.bsky.social
🚨The 2025 #NobelPrize for Physics goes to John Clark, Michel Devoret & John Martinis “for the discovery of macroscopic quantum mechanical tunnelling and energy quantization in an electric circuit”. More details soon... ⚛️🧪
physicsworld.com/a/john-clark...
John Clarke, Michel Devoret and John Martinis win the 2025 Nobel Prize for Physics – Physics World
Trio honoured for their work on quantum tunnelling
physicsworld.com
Reposted by Margaret Harris
benjaminpope.bsky.social
it's actually not two Nobels for Josephson junctions, just one that tunnelled over a gap of 52 years
drmlharris.bsky.social
I'd have gone with integrated circuits (2000), BEC (2001), graphene (2010), gravitational waves (2017) and exoplanets (2019), with neutrino mass (2015) as a runner-up, leaving out the Higgs boson and the accelerating expansion of the universe (which we still don't understand). What are your picks? ⚛️
physicsworld.bsky.social
At PW headquarters, we're all waiting with bated breath for this morning's physics #NobelPrize. If you're doing the same, why not pass the time by reading/arguing with our editor @matindurrani.bsky.social's picks of the 5 most notable physics Nobels this century? physicsworld.com/a/the-top-fi... 🧪⚛️
The top five physics Nobel prizes of the 21st century revealed – Physics World
Matin Durrani counts down the five most significant physics Nobels since 2000
physicsworld.com
drmlharris.bsky.social
Part 2 of PHYSICS NOBEL PRIZES YOU'VE NEVER HEARD OF is now up: bsky.app/profile/drml...
drmlharris.bsky.social
Okay, today is physics #NobelPrize day, so there's just enough time for another instalment of...

PHYSICS NOBEL PRIZES YOU’VE NEVER HEARD OF – PART 2

In 1912, a Swedish inventor called Gustaf Dalén beat Albert Einstein and Max Planck (inter alia) to the biggest prize in physics. How? Well...🧵🧪⚛️
drmlharris.bsky.social
Wow! Yes, it was a hard job, and very important.
drmlharris.bsky.social
Oh, and in case you don't believe me about the "wife guy" thing, here's a photo of Gustaf Dalén with his wife, Elma, in later life. I think they look like the perfect Swedish great-grandparents, don't you? 😍
A black-and-white photo of Elma and Gustaf Dalen. He's wearing a three-piece suit with a watch chain, she's got a 1930s hat and a dress with a top that resembles a suit jacket and a string of pearls. He's also wearing dark glasses and not looking at the camera, and she holds his arm protectively while looking slightly sceptically at the camera.
drmlharris.bsky.social
The explanation for why Gustaf Dalén won the 1912 #NobelPrize involves a horrific industrial accident, sympathetic colleagues, a household appliance that's still manufactured today, and Dalén turning out to be a total wife guy. Read it here for free: physicsworld.com/a/nobel-priz...
(12/ends) 🧪⚛️
Nobel prizes you’ve never heard of: how a Swedish inventor was honoured for a technology that nearly killed him – Physics World
Gustaf Dalén is nowhere near as famous as his contemporaries, but does that make him undeserving of the prize? Margaret Harris investigates
physicsworld.com
drmlharris.bsky.social
“This lighthouse acetylene valve stuff is all well and good,” I hear you say, “but that doesn’t explain why Dalén won the Nobel Prize for Physics for it in 1912. After all, Einstein and Planck were *right there*.”

How did Dalén win out over the authors of relativity and quantum theory?” (11/n)🧪⚛️
albert einstein is a very old man with gray hair and a mustache .
Alt: Albert Einstein winking with the caption "Just what I was thinking!"
media.tenor.com
drmlharris.bsky.social
Dalén’s third invention was a sunlight-sensitive valve that turned the acetylene off when it was sunny and on when it wasn’t, no humans required. This was especially good for light buoys (which aren’t designed to be staffed), and it was extremely reliable, requiring almost no maintenance. (10/n) 🧪⚛️
A photo of Dalen's sunlight valve, which looks like a set of tubes in a glass case. This valve worked by means of a set of metal rods, one of which was blackened while the others were polished. When the blackened rod absorbed enough heat from the Sun, it would expand and close the valve. At dusk, or in foggy conditions, the blackened rod would return to the temperature of the others, contract, and open the valve.
drmlharris.bsky.social
Having made acetylene safe to use, Dalén turned his hand to making it economical. His second invention was a device that automatically turned the acetylene supply on and off every few seconds. This saved fuel and enabled the light to flash in a distinctive pattern without rotating. (9/n) 🧪⚛️
a pixel art drawing of a lighthouse and houses with the number 00 in the top right corner
Alt: A pixel art drawing of a lighthouse and houses. The lighthouse light flashes on and off without rotating.
media.tenor.com
drmlharris.bsky.social
Under these conditions, you could store acetylene, ship it, even drop it off the side of a lighthouse without having it explode on you. It was perfectly safe...for users.

Spoiler: it was still very dangerous for the people making it. Including the eventual Nobel laureate, Gustaf Dalén. (8/n) 🧪⚛️
Black-and-white photograph of Nils Gustaf Dalén as a young man. He's wearing an old-fashioned high-collared shirt and has a large, bushy moustache.
drmlharris.bsky.social
By filling a container with agamassan, wetting it with acetone and then forcing acetylene into the container under pressure, Dalén showed that the acetylene would dissolve in the acetone and become trapped like water in a sponge. (7/n) 🧪⚛️
a cartoon of spongebob laying on the ground next to a pizza
Alt: A cartoon of Spongebob laying on the ground next to a pizza and letting water out
media.tenor.com