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  • Sobre la teoría de la relatividad especial y general - Albert Einstein August 17, 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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  • Una mochila para el universo - Elsa Punset August 17, 2017
    ¿Cuánto debe durar un abrazo? ¿De qué sirve llorar? ¿Qué podemos hacer para cambiar nuestra suerte? ¿Tiene algún propósito el enamoramiento? ¿Y por qué es tan inevitable el desamor? ¿Cómo aprendemosa tener miedo? ¿A partir de qué edad empezamos a mentir? ¿Por qué sentimos envidia? ¿Cuántos amigos necesitamos para ser felices? ¿Podemos evitar estresarnos sin […]
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  • Física General Esencial - Agustín Vázquez Sánchez August 17, 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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  • El cisne negro. Nueva edición ampliada y revisada - Nassim Nicholas Taleb August 17, 2017
    ¿Qué es un cisne negro? Para empezar, es un suceso improbable, sus consecuencias son importantes y todas las explicaciones que se puedan ofrecer a posteriori no tienen en cuenta el azar y sólo buscan encajar lo imprevisible en un modelo perfecto. El éxito de Google y You Tube, y hasta ell 11-S, son “cisnes negros”. Para Nassim Nicholas Taleb, los cisnes negr […]
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  • La teoría del todo - Stephen W. Hawking August 17, 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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  • Ágilmente - Estanislao Bachrach August 17, 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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  • El gran diseño - Stephen Hawking & Leonard Mlodinow August 17, 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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  • Breve historia de mi vida - Stephen Hawking August 17, 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 física del futuro - Michio Kaku August 17, 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 17, 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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Far Right Plans Its Next Moves With a New Energy

The ugliness of the rally — which included crowds of young white men offering the Nazi salute and which led to the death of a woman in a car attack — has resulted in a fracture on the right. […]

The Statue at the Center of Charlottesville’s Storm

At a talk given by the author and historian Edward Ayers, a Charlottesville city councilor, Kristin Szakos, asked about the city’s Confederate monuments. She wondered whether the city should discuss removing them.People around her gasped. “You would have thought I had asked if it was O.K. to torture puppies,” she recalled during a 2013 conversation on BackStory, a podcast supported by the Virginia Foundation for the Humanities.The response to her comment was heated, and swift. Ms. […]

Affirmative Action Policies Evolve, Achieving Their Own Diversity

“The reason a liberal like me is intrigued by Trump’s actions on affirmative action is that I think it could have the effect of driving universities to really pursuing socioeconomic diversity as a way of indirectly creating racial diversity,” said Richard D. Kahlenberg, a senior fellow at the Century Foundation who has pushed for class-based admissions to replace race-based admissions.Public universities in California and Washington, forbidden by state law from considering race in individual admissions decisions, have attempted to use socioeconomic factors as a substitute, hoping to draw from the overlap of minority and low-income students. Others, like the University of Texas, accept a set percentage of the top students at every state high school. Neither method has fully succeeded in composing student bodies that match the racial makeup of their states.Other colleges with more freedom to curate a student body continue to weigh race as one factor in admissions, which can lead to more diversity. But their decision-making can be so subjective that, in the minds of high school seniors staring down application season, it can border on the occult.It is this opacity that has left few happy: not Asian-American students who feel that they are being held to a higher standard, and whose complaint against Harvard has become a focus of the Justice Department’s efforts; not white students who feel similarly penalized; and not those who remain the theoretical face of affirmative action, African-American and Latino applicants who say the assumption that their success depended on their race can shadow them far beyond commencement.“When I told people I was going to Princeton, it was not uncommon for me to hear: ‘Oh, you’re going to Princeton because you are black,’” said Jonathan Haynes, a sophomore from Midland, Mich., where just 2 percent of the population is black […]

Right and Left React to Leaks and Presidential Communications

_____• David French in National Review:“Why is it inherently more compassionate to allow a low-skilled, non-English-speaking sibling of a legal immigrant to come to this country at the exact same time that our blue-collar population is struggling to attain economic stability?”Mr. French takes up the contentious back-and-forth between the CNN reporter Jim Acosta and Stephen Miller, a senior adviser to the president who was sent out this week to defend and explain the administration’s immigration policy in a news briefing. On history and policy, Mr. French argues, Mr. Miller was right. […]

Republicans Worry That White House Disarray Is Undermining Trump

But Mr. Hayes said that while a strong majority of Republican voters adored Mr […]

News Analysis: Consensus Is Health Law Can Be Fixed. Now the Hard Part.

Among the hardest hit are those who do not qualify for subsidies to help with premiums or out-of-pocket costs, which rise along with rate increases. Michael Lawson, an independent consultant for local governments in Washington, D.C., said the monthly premiums for his basic plan from CareFirst jumped to $527 this year from $290 last year. He is 60 and earns too much to get a subsidy, but because of various health problems he has already reached his $5,000 deductible for the year. He likes his plan but thinks that to keep rates more stable, Congress and the Trump administration need to do a better job of enforcing the law, particularly its requirement that most people have health insurance.PhotoDemonstrators in front of the Supreme Court in Washington in 2015 cheered after its decision to allow nationwide health care subsidies, which affirmed a key element of the health care law.Credit Zach Gibson/The New York Times“They need to enforce the A.C.A. […]

Trump Tries to Regroup as the West Wing Battles Itself

The palace intrigue spilled into public with a vulgarity-laced rant by Anthony Scaramucci, the new White House communications director, who called Mr. Priebus a “paranoid schizophrenic” and vowed to take him down. While aides fought with one another, Mr. […]