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Teens Spend Most School Phone Time on Social Media

“This moves the conversation beyond anecdotes and self-reports to real-world behavior,” said Dr. Jason Nagata.

How much time during school hours do teens spend on social media? This is what a recent study published in JAMA hopes to address as a team of researchers investigated connections between adolescent phone use during school. This study has the potential to help researchers, academic administrators, students, and parents become aware of the connections between adolescent phone use and all-around health.

For the study, the researchers analyzed data regarding smartphone app usage during school hours from 640 adolescents aged 13–18 through software installed on their phones that was approved by all participants and their parents. The goal of the study was to ascertain phone app usage during school hours, with data being obtained from September 2022 to May 2024. In the end, the researchers found that teens spent about 1.16 hours each school day on smartphones, mostly using social media apps, with higher use among older students and those from underprivileged households.

Why SpaceX Is Worth Trillions With Only $15B of Revenue

SpaceX’s valuation has the potential to reach $1.5 trillion due to its innovative technologies, including reusable rockets, Starship, and Starlink, which could revolutionize the space industry and unlock massive growth opportunities in areas such as satellite connectivity, data centers, and computing ## Questions to inspire discussion.

Starship Production & Economics.

🚀 Q: What is SpaceX’s Starship production target and cost reduction goal? A: SpaceX plans to manufacture 1,000 Starships per year by 2030 (with aspirational goals of 10,000 per year), reducing launch costs to $10/kg through fully reusable vehicles achieving 99% reliability and 30 flights per booster.

🎯 Q: When will Starship begin commercial payload launches? A: Starship is currently in testing phase with proven relighting, PEZ dispenser deployment, and large payload capacity, expected to achieve commercial readiness as reliability approaches 99% through iterative flight testing.

Starlink V3 Revenue Model.

💰 Q: What revenue will Starlink V3 generate for SpaceX? A: Starlink V3 constellation will generate $250B revenue with 50% profit margins, representing 90–95% of SpaceX’s revenue over the next 5 years according to Mach33 and ARK Invest modeling.

Continue reading “Why SpaceX Is Worth Trillions With Only B of Revenue” | >

System can diagnose infections in 20 minutes, aiding fight against drug resistance

A new technique which slashes the time taken to diagnose microbial infections from days to minutes could help save lives and open up a new front in the battle against antibiotic resistance, researchers say.

Engineers and clinicians from the UK and China are behind the breakthrough system, called AutoEnricher. It combines microfluidic technology with sophisticated analysis and machine learning to enable the diagnosis of pathogens in just 20 minutes.

The team’s paper, titled “Rapid culture-free diagnosis of clinical pathogens via integrated microfluidic-Raman micro-spectroscopy,” is published in Nature Communications.

A traditional Brazilian plant shows unexpected strength against arthritis

A humble Brazilian coastal plant used in folk medicine is now backed by science as a potential natural fighter against inflammation and arthritis.

A research team in Brazil has found strong evidence that the Joseph’s Coat plant (Alternanthera littoralis) is both safe and effective at reducing inflammation, easing pain, and protecting against arthritis. The study was carried out by scientists from the Federal University of Grande Dourados (UFGD), the State University of Campinas (UNICAMP), and São Paulo State University (UNESP).

Joseph’s Coat grows naturally along Brazil’s coastline and has long been used in traditional medicine to treat inflammation, infections, and parasitic illnesses. Despite its widespread use, there had been little scientific research confirming whether these benefits were real or whether the plant was safe.

Physicists made atoms behave like a quantum circuit

Using ultracold atoms and laser light, researchers recreated the behavior of a Josephson junction—an essential component of quantum computers and voltage standards. The appearance of Shapiro steps in this atomic system reveals a deep universality in quantum physics and makes elusive microscopic effects visible for the first time.

Josephson junctions play a central role in modern physics and technology. They enable extremely precise measurements, define the international standard for electrical voltage, and serve as essential components inside many quantum computers. Despite their importance, the quantum-scale processes occurring inside superconductors are notoriously difficult to observe directly.

To overcome this challenge, researchers at the RPTU University of Kaiserslautern-Landau turned to quantum simulation. Instead of studying electrons inside a solid material, they recreated the Josephson effect using ultracold atoms. Their approach involved separating two Bose-Einstein condensates (BECs) with an exceptionally thin optical barrier created by a focused laser beam that was moved in a controlled, periodic way. Even in this atomic system, the defining signatures of Josephson junctions emerged. The experiment revealed Shapiro steps, which are distinct voltage plateaus that appear at multiples of a driving frequency, just as they do in superconducting devices. Published in the journal Science, the work stands as a clear example of how quantum simulation can uncover hidden physics.

Entanglement enhances the speed of quantum simulations, transforming long-standing obstacles into a powerful advantage

Researchers from the Faculty of Engineering at The University of Hong Kong (HKU) have made a significant discovery regarding quantum entanglement. This phenomenon, which has long been viewed as a significant obstacle in classical quantum simulations, actually enhances the speed of quantum simulations. The findings are published in Nature Physics in an article titled “Entanglement accelerates quantum simulation.”

Simulating the dynamic evolution of matter is fundamental to understanding the universe, yet it remains one of the most challenging tasks in physics and chemistry. For decades, “entanglement”—the complex correlation between quantum particles—has been viewed as a formidable barrier. In classical computing, high entanglement makes simulations exponentially harder to perform, often acting as a bottleneck for studying complex quantum systems.

Led by Professor Qi Zhao from the School of Computing and Data Science at HKU, the research team collaborated with Professor You Zhou from Fudan University and Professor Andrew M. Childs from the University of Maryland, and overturned this long-held belief. They discovered that while entanglement hinders classical computers, it actually accelerates quantum simulations, turning a former obstacle into a powerful resource.

North Pacific winter storm tracks shifting poleward much faster than predicted

Alaska’s glaciers are melting at an accelerating pace, losing roughly 60 billion tons of ice each year. About 4,000 kilometers to the south, in California and Nevada, records for heat and dryness are being shattered, creating favorable conditions for wildfire events.

One major factor contributing to climate change in both regions is the northward shift of winter storm tracks across the North Pacific Ocean. These storms transport heat and moisture from Earth’s warmer regions toward the pole; when their tracks shift northward, more heat and moisture reach Alaska, while natural ventilation of the southwestern United States is reduced, driving temperatures upward.

In a new study published in Nature, Dr. Rei Chemke of the Weizmann Institute of Science’s Earth and Planetary Sciences Department and Dr. Janni Yuval of Google Research show that the storms’ northward shift is occurring much faster than climate models have predicted. Moreover, using a new metric based on sea-level pressure—a parameter measured consistently for decades—the researchers found that this shift is not part of natural climate variability but rather a clear consequence of climate change.

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