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Sunday, July 20, 2025
3.205 AMICOR
3.205 AMICOR
20/07/2025 o dia de hoje é anunciado como o Dia do Amigo, eu não poderia retardar mais a nova edição de nosso AMICOR. Uma grande amiga de nome ZILDA que teve um papel muito importante em nossas vidas há mais de 55 anos, enviou-me uma mensagem com a frase do Mário Quintana que desejo compartilhar com nossos AMICOR. Valderês e eu fomos padrinhos de seu primeiro filho, a quem desejamos incluir no mesmo abraço.
A significant trove of 300,000-year-old wooden tools has been unearthed at the Gantangqing archaeological site in Yunnan province, south-west China./.../
Among the many marvels of life is the cell’s ability to divide and thus enable organisms to grow and renew themselves. For this, the cell must duplicate its DNA – its genome – and segregate it equally into two new daughter cells. To prepare the 46 chromosomes of a human cell for transport to the daughter cells during cell division, each chromosome forms a compact X-shaped structure with two rod-like copies. How the cell achieves this feat remains largely unknown.
As the cell proceeds through the stages of cell division (from left to right: interphase, prometaphase, metaphase, and anaphase), chromosomes become progressively more compact through a combination of DNA looping and stacking. Image Credit: Daniela Velasco Lozano/EMBL
Um novo olhar para as vidas entrelaçadas de duas das maiores mentes do século XX.
Uma visualização da QCD ilustra como pares de partícula / antipartícula emergem do vácuo quântico por quantidades muito pequenas de tempo como consequência da incerteza de Heisenberg. Nossa compreensão do universo quântico continua a evoluir com o tempo, e Feynman e Wheeler foram dois dos físicos que empurraram a agulha para frente como nunca antes. Crédito da imagem: Derek A. Leinweber./.../#
Tony Tyson’s cameras revealed the universe’s dark contents. Now, with the Rubin Observatory’s 3.2-billion-pixel camera, he’s ready to study dark matter and dark energy in unprecedented detail.
What if gravity isn’t a pull from mass, but a push from entropy? Contributing writer George Musser tells Samir Patel about his recent reporting on this idea on a new episode of The Quanta Podcast.
Elfatih Eltahir explains why we need more local and social data, like disease spread and population growth, to better predict and address climate-related challenges.
Scientists reconstructed 500 million years of evolutionary history to reveal which came first: colorful signals or the color vision needed to see them.
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