3.204 - AMICOR

3.204 - AMICOR (eventos desde a última edição me atrazaram e posso estender por solicitação alguns dos temas enunciados, se houver interesse...)

# Leia e Luiza aos 15 anos

Léa Pisani Robinson (*27/06/1911, Caxias do Sul e+25/05/1990) Mãe da Valderês.

Luiza Cechella Achutti (*15/02/1911, Santa Maria e+ 05/12/1999), nossa mãe

    Como o mês de junho corresponde a duas datas da primeira, e pela coincidência de idade e aparência das duas lindas meninas, como seus filhos Valderês e Aloyzio casaram em 01/07/1957, resolvi compartilhar com nossos amigos algumas memórias fotográficas que andei separando a propósito. Nosso filho Luiz Eduardo, professor de Fotografia da UFRGS já postou essas fotos no FaceBoock
# Rataplan do Arrebol, Escoteiros vede a Luz!...(1950)

# Da Academia Sul-Riograndense de Medicina

# Do Giovani Benvenutti: 

"Que Quantos Años tengo?" - JOSE SARAMAGO 

# The Cosmic Chemistry of Life: What We’ve Learned from Organic Molecules in Space Samples Story by Trizzy Orozco

The Profound Implications for Humanity

©The Profound Implications for Humanity (image credits: flickr)

These discoveries force us to rethink our place in the universe. If organic molecules are everywhere, maybe life is too. The line between “out there” and “down here” gets blurrier with every new sample. We are, quite literally, made of stardust—connected to the cosmos in ways both poetic and scientific. The search for life’s origins is a journey that starts with a grain of cosmic dust and ends with the biggest questions we can ask: Are we alone? What else is possible?

# The Secret Battle of Metals Inside Every Living Cell

Story by Jan Otte

©Image by turek via Pexels

Hidden deep within each living cell, there is an unseen battle that ensues not among microbes or viruses, but among metal ions battling for supremacy. Zinc, copper, manganese, and other transition metals compete over binding sites within proteins, each competing for authority over life's vital chemical reactions. Scientists have long been aware that cells jealously guard carbon, nitrogen, and phosphorus, the components of DNA and proteins. But the metal rules, having their essential role in almost half of all enzymes, are still a mystery.

How does a cell keep more potent metals such as copper from usurping all available binding sites, leaving weaker ones such as manganese on the sidelines? And why do certain proteins only snatch zinc while others bind iron selectively? The solutions are in an old, exquisitely calibrated balancing act one that evolution has honed over billions of years.

Math and Science News from Quanta Magazine View this email in your browser

EVOLUTION | ALL TOPICS   When Did Nature Burst Into Vivid Color? By MOLLY HERRING Scientists reconstructed 500 million years of evolutionary history to reveal which came first: colorful signals or the color vision needed to see them. Read the article GEOMETRY   A New Pyramid-Like Shape Always Lands the Same Side Up By ELISE CUTTS A tetrahedron is the simplest Platonic solid. Mathematicians have now made one that’s stable only on one side, confirming a decades-old conjecture.” Read the article QUANTUM PHYSICS   Matter vs. Force: Why There Are Exactly Two Types of Particles By MATT VON HIPPEL Every elementary particle falls into one of two categories. Bosons account for the forces that move us. Fermions keep our atoms from collapsing. Read the article THE JOY OF WHY   How Does Graph Theory Shape Our World? Podcast hosted by JANNA LEVIN and STEVEN STROGATZ Maria Chudnovsky reflects on her journey in graph theory, her groundbreaking solution to the long-standing perfect graph problem, and the unexpected ways this abstract field intersects with everyday life. Listen (Apple) | Listen (Spotify) Read the transcript THE QUANTA PODCAST   The Mysterious Math of Turbulence Podcast hosted by SAMIR PATEL Turbulence is a notoriously difficult phenomenon to study. Mathematicians are now starting to untangle it at its smallest scales. In this episode, math staff writer Joseph Howlett discusses his recent reporting on a phenomenon called "superdiffusion." Listen (Apple) | Listen (Spotify) Read the story

Math and Science News from Quanta Magazine View this email in your browser

NUCLEAR PHYSICS | ALL TOPICS   Physicists Start To Pin Down How Stars Forge Heavy Atoms By JENNA AHART The precursors of heavy elements might arise in the plasma underbellies of swollen stars or in smoldering stellar corpses. They definitely exist in East Lansing, Michigan. Read the article NEUROSCIENCE   How Smell Guides Our Inner World By YASEMIN SAPLAKOGLU A better understanding of human smell is emerging as scientists interrogate its fundamental elements: the odor molecules that enter your nose and the individual neurons that translate them into perception in your brain. Read the article ARTIFICIAL INTELLIGENCE   Researchers Uncover Hidden Ingredients Behind AI Creativity By WEBB WRIGHT Image generators are designed to mimic their training data, so where does their apparent creativity come from? A recent study suggests that it’s an inevitable by-product of their architecture. Read the article THE QUANTA PODCAST   With Fifth Busy Beaver, Researchers Approach Computation’s Limits Podcast hosted by SAMIR PATEL With BEN BRUBAKER Dam! A question about computation that can be asked at infinitely many tiers of complexity turned out to be dizzyingly difficult at just level five. We finally have an answer. Listen (Apple) | Listen (Spotify) Read the story

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