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Herpes Virus Linked to Long-Term Brain and Neurological Problems

Summary: A new study reveals that herpes simplex virus-1 (HSV-1), commonly known for causing cold sores, can travel through the nasal cavity directly to the brain, causing severe and lasting neurological symptoms. In animal experiments, nasal HSV-1 infection led to persistent neurological dysfunction, including anxiety and cognitive impairment.

The researchers identified heparanase, a cellular enzyme, as a critical factor in allowing HSV-1 to cause severe, lasting neurological damage. Blocking the activity of this enzyme significantly reduced neurological damage in infected animals, highlighting a possible therapeutic target.

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 Essential India

Essential India helps you understand a vast and complicated country that will increasingly shape the future. India has the world’s biggest population and in recent years has had one of its fastest-growing economies with a large and thriving business and tech scene. It is the world’s biggest democracy, an almost miraculous achievement for such a poor and diverse country—even if its politics has grown increasingly authoritarian under Narendra Modi. India is emerging as an important player on the geopolitical stage, in hock neither to China nor America, and as a self-styled leader of the global south. Each week our correspondents will share their insights on the big Indian news and business developments, keeping you in the loop with everything from cricket to technology, social trends and electoral politics.

# MAGNETISM

Jonathan Brodrick

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Postgraduate Student of Fusion PhysicsUpvoted by 

Srinivas Charlu

, M.A. Physics & Business Studies, University of Rochester (1970) and 

Vaibhav Sharma

, PhD Physics, Cornell University (2024)

 · Updated 10y

Originally Answered: What "is" magnetism which seems to defy known physics?

Good question! I tried to work this out from the ripe age of 17, but it took me until my fourth year of undergraduate until I understood it fully. Here is the more 'technical' answer on where it comes from and why James Clerk Maxwell managed to unify it with the electric force:

One way to think about magnetism is that it is the 'relativistic correction' to the electrostatic force. This is because all information (including the spread/continual update of electric fields as charges move) can not travel faster than the speed of light.
Thus, only moving charge particles feel a magnetic force in a m

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# UNIVERSIDADE DE PORTO ALEGRE - FUNDAÇÃO - 1934

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L'indice planète vivante (IPV, en anglais living planet index ou LPI) est un indicateur d'état de la biodiversité, utilisé pour l'évaluation environnementale, en particulier par l'ONU.

Selon le Rapport planète vivante 2022 de WWF, l'indice planète vivante affiche un déclin de 69 % des populations mondiales de vertébrés entre 1970 et 2018.

C'est un indice composite¹ construit sur les tendances observées chez un grand nombre de populations d'espèces de vertébrés du monde entier (les vertébrés sont parmi les mieux connus des taxons animaux²) ; il vise à mesurer les changements temporels d'état de la biodiversité dans le monde³. Il consiste dans la moyenne des taux de décroissance de la population de nombreuses espèces de vertébrés témoin, par rapport à celle de l'année 1970.

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Exercise Boosts Memory Across All Ages

Summary: New research finds that nearly any form of exercise can enhance brain function and memory across the lifespan. This large-scale umbrella review analyzed data from over 258,000 participants and found that low- to moderate-intensity activities like yoga, Tai Chi, and even exergames significantly benefit cognition.

Children and teens saw the greatest memory gains, while people with ADHD experienced notable improvements in executive function. The findings highlight that even small bursts of movement can have profound cognitive effects, making exercise an accessible and essential brain-health strategy for everyone./.../

#Hospital Moinhos de Vento

# BBC

Answering your weirdest space questions Could meteorites really rock our world? Is our solar system shaped like a croissant?  Embark on a journey through the cosmos as we answer some of your strangest space questions.   In the dark?

# THEMARGINALIAN

FROM THE ARCHIVE | The Healing Power of Gardens: Oliver Sacks on the Psychological and Physiological Consolations of Nature

“I work like a gardener,” the great painter Joan Miró wrote in his meditation on the proper pace for creative work. It is hardly a coincidence that Virginia Woolf had her electrifying epiphany about what it means to be an artist while walking amid the flower beds in the garden at St. Ives. Indeed, to garden — even merely to be in a garden — is nothing less than a triumph of resistance against the merciless race of modern life, so compulsively focused on productivity at the cost of creativity, of lucidity, of sanity; a reminder that we are creatures enmeshed with the great web of being, in which, as the great naturalist John Muir observed long ago, “when we try to pick out anything by itself, we find it hitched to everything else in the universe”; a return to what is noblest, which means most natural, in us. There is something deeply humanizing in listening to the rustle of a newly leaved tree, in watching a bumblebee romance a blossom, in kneeling onto the carpet of soil to make a hole for a sapling, gently moving a startled earthworm or two out of the way. Walt Whitman knew this when he weighed what makes life worth living as he convalesced from a paralytic stroke: “After you have exhausted what there is in business, politics, conviviality, love, and so on — have found that none of these finally satisfy, or permanently wear — what remains? Nature remains; to bring out from their torpid recesses, the affinities of a man or woman with the open air, the trees, fields, the changes of seasons — the sun by day and the stars of heaven by night.”/.../

Tenho um motivo adicional ao compartilhar o Prof. Oliver Sachs. Minha irmã Dra. Maria Helena Cechella Achutti - também nonagenária e morando comigo desde o falecimento de minha queria esposa Dra. Valderês - é Farmacêutica e Doutora em Botânica pela Universidade de SP. Ela gosta muito de nosso esforço para manter um jardim em nossa casa, que era desde o início, um dos desejos da cunhada dela.

#IHME

Fine particulate matter exposure increases the risk of developing dementia

Q&A with an expert: Dr. Katrin Burkhart (Assistant Professor at IHME) presents new results that suggest exposure to fine particulate matter (PM2.5) increases the risk of developing all types of dementia.

IHME published a new analysis in Nature Aging to understand the relationship between fine particulate matter (PM2.5) and the risk of developing all types of dementia. The analysis also studied two major subtypes of dementia, Alzheimer’s disease and vascular dementia./.../

# LIVE SCIENCE
'Totally unexpected' galaxy discovered by James Webb telescope defies our understanding of the early universe Story by Skyler Ware

WST spotted ultraviolet light escaping from the ancient galaxy JADES-GS-z13-1 in the earliest evidence yet for the "Era of Reionization."© NASA, ESA, CSA, JADES Collaboration, J. Witstok (University of Cambridge/University of Copenhagen), P. Jakobsen (University of Copenhagen), A. Pagan (STScI), M. Zamani (ESA/Webb)Researchers discovered bright ultraviolet (UV) light coming from an ancient, distant galaxy. The findings, published March 26 in the journal Nature, suggest that the universe's first stars modified their surroundings even earlier than expected.

Shortly after the Big Bang, the universe was a soup of protons, neutrons and electrons. As the universe cooled, the protons and neutrons combined to form positively charged hydrogen ions, which then attracted negatively charged electrons to create a fog of neutral hydrogen atoms. This fog absorbed light with short wavelengths, such as UV light, blocking it from reaching farther into the universe.

But as the first stars and galaxies formed, they emitted enough UV light to knock the electrons back off the hydrogen atoms, allowing UV light out once again. Though this "Era of Reionization" is thought to have ended about a billion years after the Big Bang, scientists still aren't sure exactly when the first stars formed — or when the Era of Reionization began.

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# INTER PRESS SERVICE 

Changing Distribution of World Population

By Joseph Chamie

In contrast to the rapid growth of the high fertility countries like the DRC and Nigeria, some of the largest populations in 1950, such as Germany, Italy, Japan and Russia, have grown relatively slowly during the recent past. Credit: Shutterstock.

PORTLAND, US, Mar 4 2025 (IPS) - As the world’s population increased five-fold since the start of the 20th century, the changes in the geographic distribution of the billions of people across the planet have been ongoing and significant.

Those continuing changes in the distribution of the world’s population have weighty economic, political, social and environmental consequences (Table 1).

 

Source: United Nations.

 Particularly noteworthy are the changing proportions of the world’s population living in Africa and Europe. At the start of the 20th century the proportions of the world’s population residing in Africa and Europe were 8% and 25%, respectively. By the end of that century, the proportions were similar, 13% for Africa and 12% for Europe. By 2050, however, the proportions of the world’s population residing in Africa and Europe are expected to be very different at 26% and 7%, respectively (Figure 1).

 

Source: United Nations.

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GEOMETRY | ALL TOPICS   Years After the Early Death of a Math Genius, Her Ideas Gain New Life By JOSEPH HOWLETT A new proof extends the pioneer work of the late Maryam Mirzakhani, cementing her legacy as a pioneer of alien mathematical realms. Read the article THEORETICAL PHYSICS   ‘Next-Level’ Chaos Traces the True Limit of Predictability By CHARLIE WOOD Physicists are exploring how even ordinary physical systems put hard limits on what we can predict, even in principle. Read the article ECOLOGY   The Chemical Signature of Just One Species Can Shape an Ecosystem By MOLLY HERRING Rare and powerful compounds, known as keystone molecules, can build a web of invisible interactions among species. Read the article QUANTA SCIENCE PODCAST   How the Human Brain Contends With the Strangeness of Zero Podcast hosted by JANNA LEVIN Story by YASEMIN SAPLAKOGLU Zero, which was invented late in history, is special among numbers. New studies are uncovering how the brain creates something out of nothing. Read the article Listen to the podcast