We recruited participants through two online platforms, CloudResearch and Bovitz, targeting US residents over 18 years old who self-identified as either Republican or Democrat and were active users of X (SM section S1.1). Qualified individuals were invited to complete a screening task, which included installing a browser extension that analyzed their X feed. To ensure the interventions could have a meaningful impact on participants' feeds, only those with at least 5% of posts related to politics or social issues were invited to participate. Figure S1 summarizes the recruitment funnel, including the number of individuals at each stage of the process. Participants were not instructed to use X in any particular way, but they received daily reminders if they had not used the platform that day.

Social media is an important source of political information, yet there is little external oversight of platforms' ever-changing algorithms and policies. This opacity presents a major problem: Conducting a real-world experiment on the causal effects of platform features generally requires the collaboration of the platform being studied, which rarely happens, and even when it does, future platform changes may invalidate prior findings. The authors introduce a methodological paradigm for testing the effect of social media on partisan animosity without platform collaboration by reranking users' existing feeds using large language models (LLMs) and a browser extension. They find that changing the visibility of polarizing content can influence people's feelings about opposing partisans. Social media is in a period of upheaval.

National Guard soldiers shot in Washington DC'terror attack' are named... as Afghan gunman's chilling 40-hour drive across the country emerges Patrick Mahomes' bizarre addition to his Thanksgiving meal leaves fans disgusted My book on the Kennedys was used as a'mistress manual' by Olivia Nuzzi... then this wannabe Carolyn Bessette had the nerve to hound me with these outrageous texts: MAUREEN CALLAHAN Bryan Kohberger becomes nightmare prison diva... as he throws huge tantrum over BANANAS behind bars Campbell's under fire again just a day after top exec was canned for soup ingredient bombshell Watch distressing moment'drugged' Tara Reid COLLAPSES... as friends reveal urgent developments about'surveillance footage': 'They should be prosecuted' Deaths from highly infectious virus are growing... as states brace for widespread outbreaks Karoline Leavitt's family member was swarmed by ICE agents while picking up son from school as child's father tell her to'self deport' Cuckolded ex of writer who'had affair' with RFK Jr rebounds with lookalike feminist... who hates men but fetches his coffee How my bifold doors nearly killed me. It's a middle-class status symbol, but a horrific danger landed me in surgery. Her people tell me extraordinary accusation is'highly defamatory'. Princess of Wales visits the Anna Freud Centre to launch new project supporting children's mental health READ MORE: Gulf Stream on the verge of collapsing reveals key'fingerprint' Melting the West Antarctic Ice Sheet could save the Gulf Stream, a remarkable new study reveals. The vast icy mass in the southern hemisphere contains around 750,000 cubic miles of ice - enough to fill Wembley Stadium nearly three billion times.

National Guard soldiers shot in Washington DC'terror attack' are named... as Afghan gunman's chilling 40-hour drive across the country emerges Patrick Mahomes' bizarre addition to his Thanksgiving meal leaves fans disgusted My book on the Kennedys was used as a'mistress manual' by Olivia Nuzzi... then this wannabe Carolyn Bessette had the nerve to hound me with these outrageous texts: MAUREEN CALLAHAN Bryan Kohberger becomes nightmare prison diva... as he throws huge tantrum over BANANAS behind bars Campbell's under fire again just a day after top exec was canned for soup ingredient bombshell Watch distressing moment'drugged' Tara Reid COLLAPSES... as friends reveal urgent developments about'surveillance footage': 'They should be prosecuted' Deaths from highly infectious virus are growing... as states brace for widespread outbreaks Karoline Leavitt's family member was swarmed by ICE agents while picking up son from school as child's father tell her to'self deport' Cuckolded ex of writer who'had affair' with RFK Jr rebounds with lookalike feminist... who hates men but fetches his coffee How my bifold doors nearly killed me. It's a middle-class status symbol, but a horrific danger landed me in surgery. Her people tell me extraordinary accusation is'highly defamatory'. Princess of Wales visits the Anna Freud Centre to launch new project supporting children's mental health Do YOU drink more than your partner? Mismatched alcohol consumption is a'warning sign' for your marriage, study finds Couples who booze together, stay together, according to a new study.

The roll-out of the European Union's Artificial Intelligence Act has hit a critical turning point. The act establishes rules for how AI systems can be used within the European Union. It officially entered into force on August 1 2024, although different rules come into effect at different times. The European Commission has now proposed delaying parts of the act until 2027. This follows intense pressure from tech companies and from the Trump administration.

Spotify Wrapped is the streaming service's yearly review of users' listening habits. When it does arrive, the recap will likely fix the usual mix of users' top songs and most-streamed artists, as well as some interesting facts about how much you've listened over the year. In previous years, Spotify has always made sure to drop in a few unusual or surprising features, so expect to see a new way of reviewing your music this year. Despite users clamouring to learn when Spotify Wrapped will arrive, the company has never set a firm date for its release. Currently, you can access a landing page for the 2025 Spotify Wrapped, but it only links back to the 2024 recap.

Karoline Leavitt's family member was swarmed by ICE agents while picking up son from school as child's father tell her to'self deport' Deaths from highly infectious virus are growing... as states brace for widespread outbreaks My book on the Kennedys was used as a'mistress manual' by Olivia Nuzzi... then this wannabe Carolyn Bessette had the nerve to hound me with these outrageous texts: MAUREEN CALLAHAN Katy Perry's legal victory as judge orders disabled veteran to pay singer nearly $2m over Montecito mansion Trump reveals next DC renovation project to remove'Biden filth' after White House ballroom Cracker Barrel CEO whines that she got'fired by America' for woke redesign Kroger employee reveals shocking amount laundry products have increased by... 'biggest price jump I've seen in a single week' Hollywood heir, 23, whose mom Anne Heche died in horror car fireball has secret LOVE CHILD with 43-year-old... now she's telling all Missing Melodee Buzzard's mom'left her daughter with strangers she met at the zoo' Rachel Zoe reveals why she dumped husband of 26 years... and if she has started dating again Horrific moment cops found body of Cowboys star Marshawn Kneeland after he shot himself at end of 145 mph chase'This is pretty lurid' Jenny McCarthy, 53, reveals health emergency that involved NINE surgeries, her'teeth falling out' and'growth' on her eyeballs Maryland grandma, 58, dragged across floor after being deported to country she'has never even visited' The United Nations (UN) has confirmed that Earth's planetary defenses will be observing the interstellar comet 3I/ATLAS as it races through our solar system . Starting on November 27, a global team of scientists with the International Asteroid Warning Network (IAWN) will kick off a two-month campaign to track the comet as it nears our planet . 'While it poses no threat, comet 3I/ATLAS presents a great opportunity for the IAWN community to perform an observing exercise due to its prolonged observability from Earth and high interest to the scientific community,' the UN explains on its website. 'This 3I/ATLAS campaign is the 8th IAWN observing exercise since 2017 - IAWN holds these exercises roughly once a year.' While 3I/ATLAS was only discovered in July 2025, the UN explained that this'comet campaign' has long been planned.

AI/ML models have rapidly gained prominence as innovations for solving previously unsolved problems and their unintended consequences from amplifying human biases. Advocates for responsible AI/ML have sought ways to draw on the richer causal models of system dynamics to better inform the development of responsible AI/ML. However, a major barrier to advancing this work is the difficulty of bringing together methods rooted in different underlying assumptions (i.e., Dana Meadow's "the unavoidable a priori"). This paper brings system dynamics and structural equation modeling together into a common mathematical framework that can be used to generate systems from distributions, develop methods, and compare results to inform the underlying epistemology of system dynamics for data science and AI/ML applications.

Post-Double-Lasso is becoming the most popular method for estimating linear regression models with many covariates when the purpose is to obtain an accurate estimate of a parameter of interest, such as an average treatment effect. However, this method can suffer from substantial omitted variable bias in finite sample. We propose a new method called Post-Double-Autometrics, which is based on Autometrics, and show that this method outperforms Post-Double-Lasso.

Real-time water-level monitoring across many locations is vital for flood response, infrastructure management, and environmental forecasting. Yet many sensing methods rely on fixed instruments - acoustic, radar, camera, or pressure probes - that are costly to install and maintain and are vulnerable during extreme events. We propose a passive, low-cost water-level tracking scheme that uses only LTE downlink power metrics reported by commodity receivers. The method extracts per-antenna RSRP, RSSI, and RSRQ, applies a continuous wavelet transform (CWT) to the RSRP to isolate the semidiurnal tide component, and forms a summed-coefficient signature that simultaneously marks high/low tide (tide-turn times) and tracks the tide-rate (flow speed) over time. These wavelet features guide a lightweight neural network that learns water-level changes over time from a short training segment. Beyond a single serving base station, we also show a multi-base-station cooperative mode: independent CWTs are computed per carrier and fused by a robust median to produce one tide-band feature that improves stability and resilience to local disturbances. Experiments over a 420 m river path under line-of-sight conditions achieve root-mean-square and mean-absolute errors of 0.8 cm and 0.5 cm, respectively. Under a non-line-of-sight setting with vegetation and vessel traffic, the same model transfers successfully after brief fine-tuning, reaching 1.7 cm RMSE and 0.8 cm MAE. Unlike CSI-based methods, the approach needs no array calibration and runs on standard hardware, making wide deployment practical. When signals from multiple base stations are available, fusion further improves robustness.