Drinking water in plastic bottles contains countless particles too small to see. New research finds that people who drink water from them on a daily basis ingest far more microplastics than those who don’t.

In the mid-19th century, Bernhard Riemann conceived of a new way to think about mathematical spaces, providing the foundation for modern geometry and physics.

Chinese companies have pledged hundreds of billions of dollars in clean energy manufacturing investments overseas, but the projects are having significant social, environmental, and human rights impacts.

Une affection oculaire rare, nommée cataractes en arbre de Noël, produit un scintillement polychrome dans le cristallin, évoquant les guirlandes festives. Ces cristaux multicolores, visibles sous l’éclairage focal des ophtalmologistes, surprennent par leur beauté saisissante. Liée au vieillissement, elle résulte d’un excès de cystine favorisé par le calcium. Bien que généralement inoffensive pour la vision, elle ... Lire plus

L'article Cataractes en arbre de Noël illuminent les yeux d’un éclat féerique est apparu en premier sur Fredzone.

Les spécialistes de la psychologie positive conseillent souvent des exercices structurés pour booster le bien-être, comme tenir un journal de gratitude ou accomplir des actes de gentillesse. Pourtant, une enquête récente révèle qu’ils appliquent rarement ces pratiques au quotidien. Leur secret réside dans un état d’esprit flexible, baptisé meliotropic wellbeing mindset, qui intègre naturellement le bonheur ... Lire plus

L'article Experts en psychologie positive privilégient un état d’esprit orienté bien-être est apparu en premier sur Fredzone.

Une équipe de l’Université de Sharjah, aux Émirats arabes unis, démontre que l’extrait d’ail combat efficacement les bactéries buccales nocives, à l’image du chlorhexidine, référence actuelle des bains de bouche. Cette substance naturelle réduit particulièrement les Mutans Streptococci, principaux responsables des caries dentaires. Moins d’effets secondaires graves émergent, bien que des études plus vastes s’imposent pour ... Lire plus

L'article Extrait d’ail rivalise avec le chlorhexidine dans les bains de bouche est apparu en premier sur Fredzone.

Des chercheurs japonais identifient une bactérie intestinale extraite de la grenouille arboricole japonaise capable d’éradiquer complètement des tumeurs chez la souris. Cette souche, nommée Ewingella americana, active les défenses immunitaires sans effets secondaires graves. Les résultats ouvrent des perspectives innovantes pour les traitements anticancéreux, en s’inspirant de la résistance naturelle des amphibiens au cancer.​​ Origine de ... Lire plus

L'article Découverte prometteuse de bactérie anticancéreuse chez la grenouille japonaise est apparu en premier sur Fredzone.

In Pirates of the Caribbean, Jack and Will use an overturned dinghy to hold air underwater. Madness or brilliance?

Although wolf-canine interbreeding has been considered extremely rare, the latest research shows that many present-day canines carry a small amount of wolf genes.

How well have you been following events in physics? There are 20 questions in total: blue is your current question and white means unanswered, with green and red being right and wrong.

16–20 Top quark – congratulations, you’ve hit Einstein level

11–15 Strong force – good but not quite Nobel standard

6–10 Weak force – better interaction needed

0–5 Bottom quark – not even wrong

The post Check your physics knowledge with our bumper end-of-year quiz appeared first on Physics World.

WIRED spoke with DeepMind’s Pushmeet Kohli about the recent past—and promising future—of the Nobel Prize-winning research project that changed biology and chemistry forever.

More accurate and individualized health predictions will allow for preventative factors to be implemented well in advance.

This episode of the Physics World Weekly podcast features Pat Hanrahan, who studied nuclear engineering and biophysics before becoming a founding employee of Pixar Animation Studios. As well as winning three Academy Awards for his work on computer animation, Hanrahan won the Association for Computing Machinery’s A.M. Turing Award for his contributions to 3D computer graphics, or CGI.

Earlier this year, Hanrahan spoke to Physics World’s Margaret Harris at the Heidelberg Laureate Forum in Germany. He explains how he was introduced to computer graphics by his need to visualize the results of computer simulations of nervous systems. That initial interest led him to Pixar and his development of physically-based rendering, which uses the principles of physics to create realistic images.

Hanrahan explains that light interacts with different materials in very different ways, making detailed animations very challenging. Indeed, he says that creating realistic looking skin is particularly difficult – comparing it to the quest for a grand unified theory in physics.

He also talks about how having a background in physics has helped his career – citing his physicist’s knack for creating good models and then using them to solve problems.

The post Oscar-winning computer scientist on the physics of computer animation appeared first on Physics World.

Novo Nordisk’s semaglutide will soon be available in a daily pill Americans can take for weight loss.

An analysis of the expansion of cracks in the Thwaites Glacier over the past 20 years suggests that a total collapse could be only a matter of time.

Smartwatches are cool and all, but have you considered wearable neurotech?

The leading approach to the simplex method, a widely used technique for balancing complex logistical constraints, can’t get any better.

The administration’s pro-industry tilt—across three executive agencies—is feeding the MAHA movement’s growing discontent.

Merge Labs, a brain-computer interface startup that seeks to read brain activity using ultrasound, is being spun out of Forest Neurotech, a Los Angeles nonprofit.

Polling shows that nearly half of Americans now believe aliens have visited this planet—and that the number who aren't sure has dropped by two-thirds. The reasons why, experts say, are complicated.

As the world looks to incorporate more renewables into energy grids, centuries-old systems that can balance supply and demand are being reappraised and innovated upon.

Science Corporation, founded by Neuralink’s first president, Max Hodak, has unveiled a prototype machine to extend the life of organs for longer periods.

Yale epidemiologist Harvey Risch, who has entertained a connection between Covid vaccines and “turbo cancer” and promoted ivermectin, says he'll chair the President's Cancer Panel.

If a major disaster like Fukushima or Chornobyl ever happens again, the world would know almost straight away, thanks to an array of government and DIY radiation-monitoring programs running globally.