Slashdot

An anonymous reader shares a report: In a preprint titled "Can LIGO Detect Daylight Savings Time?," Reed Essick, former LIGO member and now a physicist at the University of Toronto, gives a simple answer to the paper's title: "Yes, it can." The paper, which has yet to be peer-reviewed, was recently uploaded to arXiv. That might seem like an odd connection. It's true that observational astronomy must contend with noise from light pollution, satellites, and communication signals. But these are tangible sources of noise that scientists can sink their teeth into, whereas daylight savings time is considerably more nebulous and abstract as a potential problem. To be clear, and as the paper points out, daylight savings time does not influence actual signals from merging black holes billions of light-years away -- which, as far as we know, don't operate on daylight savings time. The "detection" here refers to the "non-trivial" changes in human activity having to do with the researchers involved in this kind of work, among other work- and process-related factors tied to the sudden shift in time. The presence of individuals -- whether through operational workflows or even their physical activity at the observatories -- has a measurable impact on the data collected by LIGO and its sister institutions, Virgo in Italy and KAGRA in Japan, the new paper argues. To see why this might be the case, consider again the definition of gravitational waves: ripples in space-time. A very broad interpretation of this definition implies that any object in space-time affected by gravity can cause ripples, like a researcher opening a door or the rumble of a car moving across the LIGO parking lot. Of course, these ripples are so tiny and insignificant that LIGO doesn't register them as gravitational waves. But continued exposure to various seismic and human vibrations does have some effect on the detector -- which, again, engineers and physicists have attempted to account for. What they forgot to consider, however, were the irregular shifts in daily activity as researchers moved back and forth from daylight savings time. The bi-annual time adjustment shifted LIGO's expected sensitivity pattern by roughly 75 minutes, the paper noted. Weekends, and even the time of day, also influenced the integrity of the collected data, but these factors had been raised by the community in the past.

Read more of this story at Slashdot.

The European way of life is being jeopardized by environmental degradation, a report has found, with EU officials warning against weakening green rules. The Guardian: The continent has made "important progress" in cutting planet-heating pollution, according to the European Environment Agency, but the death of wildlife and breakdown of the climate are ruining ecosystems that underpin the economy. The seventh edition of the report, which has been published every five years since 1995, found: 1. More than 80% of protected habitats are in a poor or bad state, with "unsustainable" consumption and production patterns driving loss of wildlife. 2. The EU's "carbon sink" has declined by about 30% in a decade as logging, wildfires and pests damage forests. 3. Emissions from transport and food have barely budged since 2005, despite progress in other sectors. 4. Member states have failed to adapt to extreme weather as fast as risk levels have risen. 5. Water stress already affects one in three Europeans and will worsen as the climate changes.

Read more of this story at Slashdot.

A review of 62 scientific studies published in Osteoporosis International found that microplastics weaken bones by disrupting bone marrow stem cells and stimulating osteoclasts, cells that degrade bone tissue. Laboratory experiments found the particles reduce cell viability, induce premature cellular aging, modify gene expression, and trigger inflammatory responses. Animal studies found microplastic accumulation decreases white blood cell counts and deteriorates bone microstructure, creating irregular cell structures that increase fracture risk. Rodrigo Bueno de Oliveira from the State University of Campinas in Brazil said the effects interrupted skeletal growth in test animals.

Read more of this story at Slashdot.

Anthropic's Claude Sonnet 4.5 ran autonomously for 30 hours to build a chat application similar to Slack or Teams, generating approximately 11,000 lines of code before stopping upon task completion. The model, announced today, marks a significant leap from the company's Opus 4 model, which ran for seven hours in May. Claude Sonnet 4.5 performs three times better at browser navigation and computer use than Anthropic's October technology. Beta-tester Canva deployed the model for complex engineering tasks in its codebase and product features. Anthropic paired the release with virtual machines, memory, context management, and multi-agent support tools, enabling developers to build their own AI agents using the same building blocks that power Claude Code.

Read more of this story at Slashdot.