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  • Breve historia de mi vida - Stephen Hawking August 16, 2017
    La mente maravillosa de Stephen Hawking ha deslumbrado al mundo entero revelando los misterios del universo. Ahora, por primera vez, el cosmólogo más brillante de nuestra era explora, con una mirada reveladora, su propia vida y evolución intelectual. Breve historia de mi vida cuenta el sorprendente viaje de Stephen Hawking desde su niñez […]
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  • La teoría del todo - Stephen W. Hawking August 16, 2017
    Una manera clara y amena de acercarse a los misterios del universo. En esta esclarecedora obra, el gran físico británico Stephen Hawking nos ofrece una historia del universo, del big bang a los agujeros negros. En siete pasos, Hawking logra explicar la historia del universo, desde las primeras teorías del mundo griego y de la época medieval hasta las más com […]
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  • Física General Esencial - Agustín Vázquez Sánchez August 16, 2017
    La nueva edición del ebook contiene ahora ocho temas completos de física y una sección de prácticas para realizar en casa. Se han corregido errores y agregado más ejemplos y ejercicios además de recursos multimedia en todos los capítulos.  Los ejemplos resueltos se presentan paso a paso a través de una solución algebraica con lo cual se evitan errores n […]
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  • ¿Cómo pensar como Sherlock Holmes? - Maria Konnikova August 16, 2017
    Ningún personaje de ficción es más conocido por sus poderes de intuición y observación que Sherlock Holmes. Pero, ¿es su inteligencia extraordinaria una invención de la ficción o podemos aprender a desarrollar estas habilidades, para mejorar nuestras vidas en el trabajo y en casa? A través de ¿ Cómo pensar como Sherlock Holmes? , la periodista y psicóloga Ma […]
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  • El gran diseño - Stephen Hawking & Leonard Mlodinow August 16, 2017
    Aun antes de aparecer, este libro ha venido precedido, en todos los medios de comunicación, de una extraordinaria polémica sobre  sus conclusiones: que tanto nuestro universo como los otros muchos universos posibles surgieron de la nada, porque su creación no requiere de la intervención de ningún Dios o ser sobrenatural, sino que todos los universos pro […]
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  • Sobre la teoría de la relatividad especial y general - Albert Einstein August 16, 2017
    Entre el Electromagnetismo y la Mecánica newtoniana existe una fórmula de bisagra: la teoría de la relatividad especial y general. La importancia del nuevo marco planteado por Albert Einstein se entiende por lo siguiente: la percepción del tiempo y el espacio es relativa al observador. ¿Qué significa esto? Si usted viaja a una velocidad mayor que la de la lu […]
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  • La física del futuro - Michio Kaku August 16, 2017
    Un recorrido asombroso a través de los próximos cien años de revolución científica. El futuro ya se está inventando en los laboratorios de los científicos más punteros de todo el mundo. Con toda probabilidad, en 2100 controlaremos los ordenadores a través de diminutos sensores cerebrales y podremos mover objetos con el poder de nuestras mentes, la inteligenc […]
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  • Tricks Any Dog Can Do! - Susan Day August 16, 2017
    This great book comes with advice and guidance as to the best way to teach these tricks. It offers more than one method which the reader can choose depending upon their own situation. There is also advice to using treats and shows you how to not end up with a treat junkie! This books is from the desk of Susan Day, a canine behaviourist. Susan teaches obedien […]
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  • Ágilmente - Estanislao Bachrach August 16, 2017
    Bachrach es Doctor en biología molecular y explica el funcionamiento del cerebro. A través de ello, da consejos y herramientas para ser más creativos y felices en el trabajo y en la vida. La neurociencia es clara: el cerebro aprende hasta el último día de vida. La creatividad puede expandirse. Tu mente, mediante la aplicación de las técnicas correctas, puede […]
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  • Fluidos, ondas y calor. Volumen 1 - José Luis Escamilla Reyes, Rosa María Guadalupe García Castelán & Luis Jaime Neri Vitela August 16, 2017
    El mundo de hoy en día es fascinante y a la vez misterioso. Por ejemplo, a veces hay ruidos extraños provenientes de las tuberías, de las ventanas o de las puertas. Vemos que enormes y pesados buques trasatlánticos no se hunden al cruzar el mar. Otras veces no podemos explicarnos cómo es que los pájaros pueden volar o cómo es la comunicación entre murciélago […]
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Far-Right Groups Surge Into National View in Charlottesville

Many Americans watched transfixed as members of those groups marched down the street, barked out anti-Semitic chants and openly displayed the symbols of Nazi Germany and the secessionist South.And many looked on in horror as a speeding car crashed into other vehicles on a crowded street Saturday afternoon, resulting in the death of a 32-year-old woman and injuries to at least 19 other people.Though President Trump, in his comments, declined to single out the white supremacist movement, many mainstream conservatives were appalled. Senator John McCain called the white supremacists “traitors” on Twitter.The House speaker, Paul D. Ryan, called them “repugnant.”The Justice Department announced late Saturday that it was opening a civil rights investigation. “The violence and deaths in Charlottesville strike at the heart of American law and justice,” Attorney General Jeff Sessions said in a statement. “When such actions arise from racial bigotry and hatred, they betray our core values and cannot be tolerated.”Some left-leaning Charlottesville organizers like Laura Goldblatt, a postdoctoral fellow at the University of Virginia, said that the full airing of such ideas would eventually lead more Americans to reject them. “I think this is the beginning of the end for this spectacularized part of the movement,” Ms. Goldblatt said.But some key far-right leaders say the outcome was exactly what they had hoped for.“We achieved all of our objectives,” Matthew Heimbach, a founder of the Nationalist Front, a neo-Nazi group that bills itself as an umbrella organization for the white nationalist movement, said in an interview Saturday. “We showed that our movement is not just online, but growing physically. […]

McAuliffe Counters Critics of Police Response to Charlottesville Violence

Mr. Kessler said his group had “networked with law enforcement officials” months ago on a plan for maintaining safety, which he said was not followed, and he called the police “underequipped for the situation.”Minutes before Mr. Kessler was scheduled to address the media on Sunday, the brick mall behind City Hall was packed with at least two dozen television cameras. Two uniformed officers, one armed with a sniper rifle, could be seen on the roof of a nearby building. A bouquet of flowers tied with a black ribbon lay in front of the City Hall doors.When Mr. Kessler appeared, the crowed that had assembled called him a “murderer” and a “terrorist,” drowning out his words with cries of “shame, shame.”The press conference ended when a man in a plaid shirt punched Mr […]

North Korea Threats Will Boost Tourism, Trump Tells Guam Governor

figure.prepend(style); }); }); “It just looks like a beautiful place,” Mr. Trump said. Mr. Trump had threatened to rain “fire and fury” on North Korea for any provocation. […]

Asian-Americans’ Complaint Prompted Justice Inquiry of College Admissions

A Justice Department spokeswoman, Sarah Isgur Flores, said on Wednesday that news media reports about the investigation were “inaccurate.” The department had refused to provide details about the project on Tuesday. Ms. Flores said the personnel announcement sought volunteers “to investigate one admissions complaint” filed on behalf of Asian-Americans who alleged racial discrimination in “a university’s admission policy and practices.”Newsletter Sign UpContinue reading the main storySign Up for the Race/Related NewsletterJoin a deep and provocative exploration of race with a diverse group of New York Times journalists.Thank you for subscribing.An error has occurred […]

In Breakthrough, Scientists Edit a Dangerous Mutation From Genes in Human Embryos

“We’ve always said in the past gene editing shouldn’t be done, mostly because it couldn’t be done safely,” said Richard Hynes, a cancer researcher at the Massachusetts Institute of Technology who co-led the committee. “That’s still true, but now it looks like it’s going to be done safely soon,” he said, adding that the research is “a big breakthrough.”“What our report said was, once the technical hurdles are cleared, then there will be societal issues that have to be considered and discussions that are going to have to happen. Now’s the time.”Scientists at Oregon Health and Science University, with colleagues in California, China and South Korea, reported that they repaired dozens of embryos, fixing a mutation that causes a common heart condition that can lead to sudden death later in life.If embryos with the repaired mutation were allowed to develop into babies, they would not only be disease-free but also would not transmit the disease to descendants.The researchers averted two important safety problems: They produced embryos in which all cells — not just some — were mutation-free, and they avoided creating unwanted extra mutations.“It feels a bit like a ‘one small step for (hu)mans, one giant leap for (hu)mankind’ moment,” Jennifer Doudna, a biochemist who helped discover the gene-editing method used, called CRISPR-Cas9, said in an email.Gene Editing in EmbryosScientists tried two techniques to remove a dangerous mutation. In the first, genetic “scissors” were inserted into fertilized eggs. The mutation was repaired in some of the resulting embryos but not always in every cell. The second method worked better: By injecting the “scissors” along with the sperm into the egg, more embryos emerged with repaired genes in every cell.FIRST TECHNIQUEWhen gene-editing components were introduced into a fertilized egg, some embryos contained a patchwork of repaired and unrepaired cells.Gene-editingcomponents insertedafter fertilizationCell withunrepairedgeneMaternal DNAMutationSpermPaternal DNACell withrepairedgeneOocyteFertilized cellMosaicism inlater-stage embryoNEW TECHNIQUEWhen gene-editing components were introduced with sperm to the egg before fertilization, more embryos had repaired mutations in every cell.Gene-editing componentsinserted together with sperm,before fertilizationIn 42 of 58embryostested, allcells wererepairedUniformlater-stage embryoFIRST TECHNIQUEWhen gene-editing components were introduced into a fertilized egg, some embryos contained a patchwork of repaired and unrepaired cells.Gene-editingcomponents insertedafter fertilizationMaternal DNAMutationPaternalDNASpermOocyteFertilizedcellCell withunrepairedgeneCell withrepairedgeneMosaicism inlater-stage embryoNEW TECHNIQUEWhen gene-editing components were introduced with sperm to the egg before fertilization, more embryos had repaired mutations in every cell.Gene-editingcomponents insertedtogether with sperm,before fertilizationIn 42 of 58embryostested, allcells wererepairedUniformlater-stage embryo“I expect these results will be encouraging to those who hope to use human embryo editing for either research or eventual clinical purposes,” said Dr. Doudna, who was not involved in the study.Continue reading the main storyMuch more research is needed before the method could be tested in clinical trials, currently impermissible under federal law. But if the technique is found to work safely with this and other mutations, it might help some couples who could not otherwise have healthy children.Potentially, it could apply to any of more than 10,000 conditions caused by specific inherited mutations. […]

O.J. Simpson Wins Parole, Claiming He Has Led a ‘Conflict-Free Life’

Watching the parole hearing, streamed live on countless networks and websites, it is hard now to remember that in the mid-1990s, there was just one cable news channel, and social media did not exist. The internet, reality television and the media ecosystem of wall-to-wall coverage of anything sensational were in their infancy.Yet an entire nation stopped what it was doing in 1994 as Mr. […]

Bathroom Bill Tests Clout of Rare Moderate in Increasingly Conservative Texas

Mr. Straus, 57, has put himself publicly at odds with the two most powerful Republicans in Texas, Gov. Greg Abbott and Lt. Gov. Dan Patrick, both of whom support the bathroom restrictions. And on the eve of the special session, his ability to hold onto power is under fierce attack.In San Antonio, Republican leaders in Mr. Straus’s home county, Bexar, passed a resolution in recent days calling for “a change in leadership in the Texas House speakership,” the first time the local Republican Party has given Mr […]