I'm an artist who turned tail and became a teacher—then geoscientist, working in mineralogy, sustainability and nonviolence.

Joined June 2012
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If you are in another country and want to help with US: Set up trade deals with co-operatives in the US. This will help create more co-ops in the US, and offset the influence of the horrible corporate culture here. Current US politics are an extension of their corporate culture.
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Daniel S Helman, PhD retweeted
Norway have qualified for their first World Cup since 1998, and the first thing they did was ship in their own cheese, fish and 6,000 oranges. A touching show of faith in the American food supply. Start with the cheese, since they hauled 116 kilograms of it across the Atlantic. Dairy in the United States can come from cows injected with a growth hormone called rBST, which has been banned across Europe for years and does not even have to appear on the label over here. Norwegian cows never go near it, so the players would sooner bring their own. The fish follows much the same logic. A good deal of American tuna is treated with carbon monoxide, sold to the trade under the lovely name "tasteless smoke," which fixes that bright red colour and keeps it looking fresh long after it has quietly stopped being so. Europe banned the practice in 2003, while America still permits it. Then the oranges, all 6,000 of them, because the US happily lets growers spray the skins with Citrus Red 2, a dye the World Health Organisation's cancer agency calls a possible carcinogen, all so a slightly green orange can pass for a ripe one on the shelf. Europe will not let it anywhere near food. So when a side with one shot at a World Cup takes a long look at the local cheese, fish and fruit and flies in a tonne of their own instead, you can understand how they got there. A ringing endorsement of American food, obviously.
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Daniel S Helman, PhD retweeted
Staggering that the NYT reports Trump/Miller are plotting to suspend habeas corpus (i.e. end the constitution) & by the end of the day it's treated as a non-story, not anywhere near top of major news' outlets websites.
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Daniel S Helman, PhD retweeted
The most manipulative but effective thing I’ve ever done in my life was when I read an article about how children moderate their behavior to protect their self-identity, so if a child believes he’s smart, for example, he’ll intentionally study and try to do well to protect his image of himself. Anyway, I would pull kids aside with behavioral issues at church and tell them, “David (obviously fake name), you’re such a kind person and such a good listener. I can see that in you. Thank you for always listening.” “Little Annie, thank you for taking such good care of the babies around you. You’re going to be such a good big sister. Can you be in charge of watching Sally?” They would ALWAYS behave afterward. ALWAYS. Worked like a charm. Morally questionable because it wasn’t initially true, but I kind of willed it into existence. Tbf, I did think that they had that in them or I wouldn’t have tried. Will publish longitudinal results of this method once my kid is old enough to report back.
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If you're a fan of a certain type of sci-fi, then you know how fun it is to have your perceptions shift & turn as you are reading. Check out this creative novelette by Arula Ratnakar for a great one? And hang in there? It gets very rich & very deep. clarkesworldmagazine.com/rat…
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Daniel S Helman, PhD retweeted
The plane carrying the #Uruguay national team is unable to enter the United States for the #2026WorldCup due to missing permits. Uruguay's trip to Miami, where they are set to play Saudi Arabia in their opening match tomorrow, has been delayed. This World Cup is an absolute disgrace. You are responsible for this, @FIFAWorldCup.
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Daniel S Helman, PhD retweeted
On this day in 1954, the US backed a coup against Jacobo Árbenz, the progressive, democratically elected leader of Guatemala, because he sought to restore land to small farmers and Indigenous communities that had been dispossessed by US fruit companies.
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Daniel S Helman, PhD retweeted
A FIFA World Cup host country must guarantee two fundamental principles: the safety of the country — and the unrestricted entry of all qualified teams, officials and referees. The case of referee Omar Artan from Somalia is against one of these obligations. FIFA must never compromise the universality of football. #Fifa #Somalia #GianniInfantino #CAF #OmarAtan #DonaldTrump
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Daniel S Helman, PhD retweeted
People don’t realize that the Epstein Files go SO much further than just raping underage girls. It’s why VERY powerful, hidden forces are doing everything to keep those details from ever being released.
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Daniel S Helman, PhD retweeted
🇺🇸 🇵🇸 Sama Safi, a 20-year-old American citizen and honors psychology student at Birzeit University, remains in Israeli detention after soldiers seized her from her family’s home near Ramallah at 3 a.m. on June 2, with lawmakers warning her life is at risk. Safi, whose family lives in Florida, was taken without charge and transferred to Ofer prison, then to the Moscovia interrogation center in Jerusalem, according to the Palestinian Prisoners’ Society. Her family says she has a chronic condition that causes fevers up to 105°F and requires daily medication and a quarterly injection she travels abroad to receive. She was one of five Palestinian women detained that week, including two members of the Palestinian women’s national football team. The Israeli military said the women were suspected of “promoting terrorist activities.” Rep. Rashida Tlaib and Sen. Chris Van Hollen have both demanded her release. “I am really sick and tired of the Israeli government taking American taxpayer dollars and then mistreating Americans,” Van Hollen said. Israel has not told her family or the U.S. embassy where she is being held. Rep. Tlaib said, “Her life is at risk—our government must free her now!”
Sama Safi is a 20-year old U.S. citizen and student who was kidnapped by Israeli soldiers from her family home at 3am last week and remains in Israeli prison. She has a chronic health condition and requires daily medication. Her life is at risk—our government must free her now!
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Daniel S Helman, PhD retweeted
This gets worse. So not only did the US Navy fire two missiles and kill three Indian sailors they refused to rescue the 24 Indian crew despite saying they are on fire, the vessel is sinking and that they are an all Indian crew. The Omanis rescued them.

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Jun 12
In case you didn’t watch the World Cup today (matchday 1) >Mexico beat South Africa 2-0 in a match with 3 straight red cards >South Korea beat Czechia 2-1 on a 80’ winner > South Africa became the first team since 2006 to receive 2 red cards in the same World Cup match >South Africa v Mexico had the most red cards in a World Cuo match since Portugal vs Netherlands in 2006 >Mexican fans booed the World Cup entrance of the USA & Argentina flags. >A guy named Sithole on South Africa became a meme after getting a straight red and ended the match on a 3.9 match rating > Czechia scored an Arteta Haram ball goal off a long throw after being outplayed for an hour >Son missed 3 great chances for Korea before being subbed out >A Mexican player mocked the iconic South African goal celebration from 2010 after scoring in their win vs them >Iran made their WC grand entrance with a massive golden palace thing on wheels >The first ever World Cup commercial breaks were played 🥀 > Ochoa became the first player to be listed in a squad for 6 World Cups >Lamine Yamal was seen shopping at a local Walmart >Erling Haaland was featured multiple times on TV in Carolina cheering on their hockey team in the Stanley Cup finals > Scottish fans landing in Boston today are complaining that their plane ran out of beer. I’ll be posting daily recaps all World Cup long, follow me pookie :)
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Daniel S Helman, PhD retweeted
Hong Wang (MIT PhD 2019, now Associate Professor at NYU Courant & Permanent Professor at IHES) together with Joshua Zahl has achieved a major breakthrough in geometric measure theory. In February 2025, they posted a 127-page preprint proving the long-standing three-dimensional Kakeya set conjecture. A Kakeya set in ℝ³ is a compact set that contains a unit line segment in every possible direction. For over a century, mathematicians wondered how “small” such a set could be. Wang and Zahl proved that these sets must have full Minkowski and Hausdorff dimension 3; they cannot hide in lower-dimensional space, even though they can have zero volume. This result settles a fundamental question with deep connections to Fourier analysis, the restriction problem, PDEs, and incidence geometry. Their work builds on years of incremental progress (including their own earlier papers from 2022 onward) and introduces powerful new volume estimates for unions of tubes and convex sets.
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Daniel S Helman, PhD retweeted
A toothpaste company has quietly killed the entire market research industry and nobody is talking about it. Colgate published a paper showing you can predict real purchase intent at 90% accuracy by simply asking LLMs to roleplay customers. And this is beyond insane. If you ask an AI, "Rate this product from 1 to 5," it gives safe, middle-of-the-road garbage. So researchers invented a method called Semantic Similarity Rating (SSR). Instead of asking the AI for a number, they asked it to roleplay. They gave the LLM a demographic profile. They showed it a product concept. And they asked it to write down its raw, unfiltered thoughts. Then, they used a semantic model to translate those written thoughts into a numerical score. The results are staggering. Tested against 57 real corporate surveys and 9,300 actual human responses, the synthetic AI consumers matched real human buying behavior with 90% reliability. They perfectly mirrored how different age brackets and income levels react to price changes. And they provided detailed, qualitative feedback that was deeper and more critical than what actual humans wrote. This destroys the economics of traditional market research. You don't need to wait a month to see if a product will sell. You can simulate 1,000 hyper-targeted customer interviews overnight. You can A/B test pricing across every demographic instantly.
Community note
The 90% figure refers to the AI method achieving 90% of human test-retest reliability for purchase intent surveys, not 90% accuracy in predicting real purchases. It was tested on personal care products in categories LLMs know well. arxiv.org/abs/2510.08338
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Daniel S Helman, PhD retweeted
We've been running an unprecedented natural experiment running for a decade and half. 30 states have raised their minimum wages. 20 have not. What happened to pay? What happened to jobs? The good news is that it's pretty easy to figure out now. Link next post.
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Daniel S Helman, PhD retweeted
On this day 382 years ago Evangelista Torricelli described an experiment in a letter to a friend. Fill a meter-long glass tube with mercury, close it, flip it into a basin of mercury. The column falls to 76 cm. Always 76 cm. The gap above the mercury was the first vacuum ever made, something Aristotle had called impossible. Torricelli explained what holds the column up: "We live submerged at the bottom of an ocean of the element air, which by unquestioned experiments is known to have weight." The mercury is not pulled from above. It is pushed from below by the weight of the atmosphere on the basin. One page, two revolutions: vacuums exist, and air is an ocean with us at the bottom. Four years later Pascal had a barometer carried up a mountain and watched the column drop.
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Daniel S Helman, PhD retweeted
The Azteca is a proper football stadium. The whole tournament should've been in Mexico, but that wouldn't earn FIFA the money they want. No one would have visa issues. Everyone would be welcomed with grace. A proper world cup atmosphere.
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Daniel S Helman, PhD retweeted
Jun 10
I remember when I was a kid in the 90s hanging out with a bunch of really smart activist punk types, people that had read every book about revolution etc. They said you'll know when society is about to collapse because everything will jut become more and more expensive day by day
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Daniel S Helman, PhD retweeted
Honestly, i don't understand this economy when nursing homes are so expensive they bankrupt our grandparents but nursing home aides need to use food banks. daycare is so expensive it eats up one parent's entire paycheck and yet daycare providers only make $10/hr and need second jobs. college costs hundreds of thousands of dollars and puts students into debt for life and yet we have thousands of professors living in their cars. everything we need is astronomically expensive and yet almost none of the money we pay is going towards the people actually doing the work and providing the services.
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Daniel S Helman, PhD retweeted
There's actually legislation in Califomia to shorten the workweek from 40 hours to 32 hours without a reduction in pay, which would be the most transformative labor legislation in our generation, and it should be bigger news but it barely made a headline.
Community note
California has no active legislation mandating a 32-hour workweek without pay reduction; a prior bill (AB 2932) to require it for large employers died without a vote in 2022. calmatters.org/economy/2023/0… leginfo.legislature.ca.gov/faces/billNavC…
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Daniel S Helman, PhD retweeted
Replying to @RealCheckMarker
I will never forget when we began hearing Covid causes more T cell death & loss of naive T cells than HIV. Then The Establishment came for AJ & the people who were saying this, & everyone was silenced until a billionaire began saying it last year.
Interesting. Uchicago finds in a preprint a strong signature of T cell apoptosis in Covid- more than HIV, and a loss of naive T cells I wrote about t cell apoptosis and a loss of naive T cells in frontiers in 2020 as being problematic biorxiv.org/content/10.1101/…
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