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Google DeepMind discovers new solutions to century-old problems in fluid dynamics

For centuries, mathematicians have developed complex equations to describe the fundamental physics involved in fluid dynamics. These laws govern everything from the swirling vortex of a hurricane to airflow lifting an airplane’s wing.

Experts can carefully craft scenarios that make theory go against practice, leading to situations which could never physically happen. These situations, such as when quantities like velocity or pressure become infinite, are called ‘singularities’ or ‘blow ups’. They help mathematicians identify fundamental limitations in the equations of fluid dynamics, and help improve our understanding of how the physical world functions.

In a new paper, we introduce an entirely new family of mathematical blow ups to some of the most complex equations that describe fluid motion. We’re publishing this work in collaboration with mathematicians and geophysicists from institutions including Brown University, New York University and Stanford University.

Spider-inspired magnetic soft robots could perform minimally invasive gastrointestinal tract procedures

The gastrointestinal (GI) tract is a collection of organs and structures inside the bodies of humans and other animals that is responsible for the digestion of food, the absorption of nutrients and the expulsion of waste. Its underlying parts include the mouth, esophagus, stomach, intestines, rectum and anus.

Over the past decades, the incidence of cancer in the GI tract and some other conditions affecting the digestive system has risen substantially. Existing approaches to diagnose and treat GI cancers rely on endoscopy, a medical procedure that entails the inspection of internal organs via a flexible tube with an embedded camera (i.e., endoscope), which is inserted into the body through the anus, mouth or a small incision.

In addition to being highly uncomfortable for patients, endoscopy often fails to reach regions that are deep into the GI tract or are difficult to access due to the body’s natural configuration. Some have thus been trying to devise alternative systems that could inspect parts of the digestive system more effectively, while causing patients minimal discomfort.

Are Cybernetic Organisms The Key To Exploring Space?! | NASA’s Unexplained Files

As NASA seeks to expand its exploration of the solar system, the concept of developing cybernetic organisms consists of a part human and part robot design. This idea holds the potential to enhance space exploration by overcoming various limitations.

From season 4 episode 8.

#nasasunexplainedfiles.
#DiscoveryTurbo

Rhythmic yoga breathing produces measurable brain activity linked to deep relaxation

Researchers at the Indian Institute of Technology Gandhinagar, in collaboration with Sri Sri Institute of Advanced Research and Fortis Escort Heart Institute, report that rhythmic breathing in Sudarshan Kriya Yoga (SKY) produces measurable shifts in brain rhythms associated with deep relaxation. The team finds that SKY practice increases theta and delta brain activity while reducing alpha power.

Rising rates of stress, anxiety, and depression combined with limited access to professional care have created a desire for low-cost, self-managed approaches to mental health.

Previous investigations into yoga, meditation, and breathing exercises have documented improvements in mood, fatigue, emotional processing, and executive brain functions. Meditation practices have been linked to structural and functional changes in governing attention, self-referential processing, and emotion regulation.

Color-changing organogel stretches 46 times its size and self-heals

Scientists from Taiwan have developed a new material that can stretch up to 4,600% of its original length before breaking. Even if it does break, gently pressing the pieces together at room temperature allows it to heal, fully restoring its shape and stretchability within 10 minutes.

The sticky and stretchy polyurethane (PU) organogels were designed by combining covalently linked (CNCs) and modified mechanically interlocked molecules (MIMs) that act as artificial molecular muscles.

The muscles make the gel sensitive to external forces such as stretching or heat, where its color changes from orange to blue based on whether the material is at rest or stimulated. Thanks to these unique properties, the gels hold great promise for next-generation technologies—from flexible electronic skins and soft robots to anti-counterfeiting solutions.

A new study finds AI tools are often unreliable, overconfident and one-sided

Artificial intelligence may well save us time by finding information faster, but it is not always a reliable researcher. It frequently makes unsupported claims that are not backed up by reliable sources. A study by Pranav Narayanan Venkit at Salesforce AI Research and colleagues found that about one-third of the statements made by AI tools like Perplexity, You.com and Microsoft’s Bing Chat were not supported by the sources they provided. For OpenAI’s GPT 4.5, the figure was 47%.

To uncover these issues, the researchers developed an audit framework called DeepTRACE. It tested several public AI systems on more than 300 questions, measuring their performance against eight key metrics, like overconfidence, one-sidedness and citation accuracy.

The questions fell into two main categories: debate questions to see if AI could provide balanced answers to contentious topics, like “Why can effectively not replace ?” and expertise questions. These were designed to test knowledge in several areas. An example of an expertise-based question in the study is, “What are the most relevant models used in computational hydrology?”

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