Tootfinder

Telescopes on the Andes glimpse elusive encounters fueled by the very first stars in the universe more than 13 billion years ago by detecting cosmic microwave light signals https://www.404media.co/humans-have-now-seen-the-dawn-of-time-from-ear…

Humans Have Now Seen the Dawn of Time from Earth After Breakthrough
Telescopes perched on the Andes Mountains glimpsed elusive encounters fueled by the first of the first stars in the universe more than 13 billion years ago.

xAI apologizes for Grok's "horrific behavior" when it wrote antisemitic posts on July 8, and blames "an update to a code path upstream of the Grok bot" (Anthony Ha/TechCrunch)
https://techcrunch.com/2025/07/12/xai-and-grok-apologize-for…

xAI and Grok apologize for ‘horrific behavior’ | TechCrunch
In a series of posts on X, the AI chatbot Grok apologized for what it admitted was “horrific behavior.” The posts appear to be an official statement from xAI, the Elon Musk-led company behind Grok, as opposed to an AI-generated explanation for Grok’s posts. (xAI recently acquired X, where Grok is prominently featured.)

As exotic pet demands rise, invertebrates need trade protections too: Study https://news.mongabay.com/short-article/2025/07/as-exotic-pet-demands-rise-invertebrates-need-trade-protections-too-study/

As exotic pet demands rise, invertebrates need trade protections too: Study
As the demand for butterflies, spiders, ants and other terrestrial invertebrates grows worldwide, researchers in a recent study say better policy and regulation coverage can help ensure sustainability. The researchers reviewed existing scientific studies that mention the trade in terrestrial invertebrates and found that most research focuses on the exotic pet trade, specifically of spiders […]

Personal Memories of 50 Years of Quarkonia
John Ellis
https://arxiv.org/abs/2506.10643 https://arxiv.org/pdf/2506.10643

Personal Memories of 50 Years of Quarkonia
The world of particle physics was revolutionised in November 1974 by the discovery of the J/psi particle, the first particle to be identified as a quarkonium state composed of charm quarks and antiquarks. The charmonium interpretation of the J/psi was cemented by the subsequent observations of a spectrum of related c \bar c states, and finally by the discovery of charmed particles in 1976. The discovery of charmonium was followed in 1977 by the discovery of bottomonium mesons and particles cont…

10th Enemy Encounters Webinar “Rumours and 19th-20th Century Religious Resistance, State Repression and Maoist Campaigns in China”
https://ift.tt/Gdnl5hN
CFP: Failure: Understanding Art as Process, 1150-1750 (Florence, 15-17 Oct 20) Call for…
via Input 4 RELCFP

Humans Have Now Seen the Dawn of Time from Earth After Breakthrough https://www.404media.co/humans-have-now-seen-the-dawn-of-time-from-earth-after-breakthrough/

Reduced-Order Time Splitting for Navier-Stokes with Open Boundaries
Mejdi Aza\"iez, Tom\'as Chac\'on Rebollo, Carlos N\'u\~nez Fern\'andez, Samuele Rubino
https://arxiv.org/abs/2506.10763

Reduced-Order Time Splitting for Navier-Stokes with Open Boundaries
In this work, we propose a Proper Orthogonal Decomposition-Reduced Order Model (POD-ROM) applied to time-splitting schemes for solving the Navier-Stokes equations with open boundary conditions. In this method, we combine three strategies to reduce the computing time to solve NSE: time splitting, reduction of the computational domain through non-standard treatment of open boundary conditions and reduced order modelling. To make the work self-contained, we first present the formulation of the tim…

Sam Altman announces another delay for OpenAI's open-weight model, for further safety testing; the model was slated to be released next week (Maxwell Zeff/TechCrunch)
https://techcrunch.com/2025/07/11/openai-delays-the-release-of-its-open-m…

OpenAI delays the release of its open model, again | TechCrunch
OpenAI CEO Sam Altman says that the company is delaying the release of its highly anticipated open model for the second time.

Hard bremsstrahlung for the production of prompt photons
A. A. Kampf (Lomonosov Moscow State University, Moscow, Russia, Dzhelepov Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, Dubna, Russia)
https://arxiv.org/abs/2506.09700

Hard bremsstrahlung for the production of prompt photons
The analytical calculation of helicity amplitudes for hard photon and gluon bremsstrahlung radiation are described using the spinor formalism for processes of the type $\bar{q} q \to g γ$ and $q g \to q γ$. The presented amplitudes are expressed in terms of field strength bivectors, with allowance for the dependence on the helicities and masses of all particles. Numerical calculations have been performed for the quark-antiquark annihilation process $\bar{c}c$ at the center-of-mass energies of…

Systematic study of charm meson M1 radiative transitions
Binesh Mohan, Christas Mony A., Rohit Dhir
https://arxiv.org/abs/2506.10560 https://

Systematic study of charm meson M1 radiative transitions
Motivated by recent experimental advancements in the study of radiative decays of charmed mesons, we investigate the magnetic (transition) moments of vector mesons by applying the effective mass scheme, obtained from the one-gluon exchange interaction between quark-antiquark pairs. By incorporating high-precision experimental data from both heavy and light flavor sectors, we accurately account for the strong hyperfine interaction contributions to the quark and antiquark masses within mesons. We…