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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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Police Brace for More White Nationalist Rallies, but Have Few Options

Mayor Walsh said that Boston wanted to discourage the rally’s organizers from coming, and that William B. Evans, the police commissioner, was developing a plan to keep the rally and any counterdemonstrations separate. By late Monday, it appeared that some of the billed speakers were backing out.But if there is a rally, unlike the authorities in Charlottesville, officials in Boston will probably not be forced to confront a large number of armed protesters because Massachusetts allows only those with a gun license to openly carry a firearm. In Virginia, no license is required for those over 18.In South Carolina, where there were dozens of protests related to the removal of the Confederate battle flag from government buildings, firearms are prohibited from the State Capitol grounds. Leroy Smith, the state director of public safety, said that intense anger over such issues combined with the presence of firearms would have been a toxic mix.“With the added element of open carry, it creates more of a challenge for law enforcement officers because usually when you see a weapon and that person is not a law enforcement officer, you know you need to defuse the situation,” he said.Many urban police chiefs have opposed open-carry laws, even in states where people feel fiercely protective of their gun rights.John Eterno, a former training instructor with the New York Police Department who now teaches at Molloy College, said the presence of weapons combined with the unexpectedly large crowds in Charlottesville might have thrown off that city’s planning. When people have the right to carry firearms, the police must balance caution with respect, he said. Officers can do little more than check the person’s demeanor for signs of aggression and monitor whether the firearm is properly holstered.The Charlottesville police have faced a hailstorm of criticism from protesters and counterprotesters alike […]

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. […]

New York Today: New York Today: Ferry Journeys

Weather.init(); }()); It should be sweet afternoon for that seaside smoothie. The drizzle is expected to clear late this morning. After that, expect some strengthening sunshine with the occasional cloud and highs near 80. This evening is looking delightful, too, as is the rest of the week — blue skies for days. […]

Trump Keeps His Conservative Movement Allies Closest

Their outreach extends to groups across the ideological spectrum — small government, tax-averse Tea Party followers; gun owners; abortion opponents; evangelical Christians and other culturally traditional voters. And it reflects the importance that Mr. Trump and his aides have placed on the movement politics of the right, which they recognize as the one base of support they cannot afford to alienate since conservatives, according to Gallup, are 36 percent of the electorate.“You want the structures that deliver people, votes and enthusiasm — and he understands that,” said Grover Norquist, the veteran anti-tax activist who has been working with White House officials as they develop a tax legislation package.“Where’s Trump been the most solid?” Mr. Norquist asked, listing the range of conservative constituencies the president has prioritized. “Taxes. He’s never going to raise taxes. Pro-life, he gets that. Home schoolers, he listens to them. And guns. […]

Public Health: Revised Senate Health Bill Tries to Win Votes, but Has Fewer Winners

The Senate bill would still make fundamental changes to Medicaid, which covers poor and disabled Americans, including two-thirds of all nursing-home residents. And it would still ask middle-income Americans to pay a larger share of their incomes for health plans with higher deductibles. Moderate Republicans had asked for changes that would make the bill more generous to poor and elderly Americans who would lose out, and those requests were largely ignored.PhotoProtesters in Elizabethtown, Ky., waited for the arrival of Mitch McConnell, the Senate majority leader, at a dinner event in his home state last month.Credit Timothy D […]

Bikes are road vehicles, too

You might think drivers in rural towns would be friendlier toward cyclists, but, believe me, they’re not. […]

Photo: Happy 4th of July, TreeHugger-style

Our patriotic photo of the day is one for the birds. […]