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  • El gran diseño - Stephen Hawking & Leonard Mlodinow June 23, 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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  • La tabla rasa - Steven Pinker June 23, 2017
    La concepción que podamos tener de la naturaleza humana afecta a todos los aspectos de nuestra vida, desde la forma en que educamos a nuestros hijos hasta las ideas políticas que defendemos. En La tabla rasa , Steven Pinker explora la idea de la naturaleza humana y sus aspectos éticos, emocionales y políticos. Demuestra que muchos intelectuales han negado su […]
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  • Ask the Brains, Part 1 - Scientific American Editors June 23, 2017
    Why do we do the things we do? The human brain is a marvelous, mysterious piece of evolution that on one hand empowers us to be rational, self-aware and innovative. On the other, the disciplines of psychiatry and psychology are a testament to our attempts to understand the human brain and behavior. Why do we persist in believing opinions despite scientific e […]
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  • Ágilmente - Estanislao Bachrach June 23, 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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  • Réussir sa mort - Fabrice Hadjadj June 23, 2017
    Ce n'est pas nous qui réussissons notre mort, c'est elle qui ne nous rate pas. À nous toutefois de ne pas la rater non plus. Que signifie dès lors réussir sa mort ? Avec verve, humour, espièglerie, mais vérité et sincérité, Fabrice Hadjadj nous invite à passer du confort au combat, à choisir la vie alors même que nous mourons et que nous mourrons. […]
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  • Inteligencia emocional para niños. Guía práctica para padres y educadores - Mireia Golobardes Subirana & Sandra Celeiro González June 23, 2017
    ¿Cómo podemos enseñar a los más pequeños a gestionar sus emociones? ¿Cómo ayudar a nuestros hijos a mejorar en sus relaciones con los demás? ¿Cómo facilitar a nuestros alumnos su capacidad para identificar sus emociones y la de los demás y favorecer relaciones sanas y positivas, con empatía y respeto? ¿Cómo contribuir a que padres y profesores puedan también […]
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  • La teoría del todo - Stephen W. Hawking June 23, 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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  • La física del futuro - Michio Kaku June 23, 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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  • EnCambio - Estanislao Bachrach June 23, 2017
    EnCambio te va a permitir alumbrar los procesos por los cuales te comportás de determinada manera con el fin de dejar atrás aquellos hábitos y conductas que ya no te sirven. El objetivo es que aprendas del potencial que tiene tu cerebro para cambiar y la capacidad que tenés vos para modificarlo. Este año cambio de trabajo, empiezo el gimnasio, bajo esos kili […]
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  • Breve historia de mi vida - Stephen Hawking June 23, 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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Nomadic tiny bookshop on wheels is wandering through France

Bringing books to small villages and festivals where they are needed most, this traveling bookshop runs out of a custom-built tiny house that’s also the bookseller’s home. […]

How to treat your vegetables like meat

Use these techniques to make veggies so good, even the meat-lovers will be salivating. […]

10 ethically made, eco-friendly backpacks

These lovely packs are made from upycled waste materials, biodegradable natural fabrics, recycled polyester, and more. […]

14 gorgeous mushrooms that show fungi’s glamorous side

Mushrooms are all too often relegated to the realm of dark and funky fungi, when in fact many are worthy of super-swooning. […]

The Electricity Lobby Was Behind the First National Christmas Tree Lighting

On Thursday night, President Barack Obama and First Lady Michelle Obama will flip the switch on 600 energy-efficient lights on the 30-ft.-tall Colorado Blue Spruce that is this year’s National Christmas Tree, in a festive ceremony featuring performances by singers James Taylor, Kelly Clarkson, Marc Anthony, and Garth Brooks and Trisha Yearwood. The annual tradition of lighting a national tree dates back to December 24, 1923, when President Calvin Coolidge pressed a button that lit up more than 2,500 light bulbs strung around a 60-ft.-tall balsam fir tree from his home state of Vermont—reportedly personally felled in “the heart of the Green Mountains” by Middlebury College’s President Paul D. Moody and shipped express to Washington by the school’s alumni. The Jan. 7, 1924, issue of TIME magazine described the sequence of events: “At 5 p. m. the President pressed a button, lighting the great National Christmas tree rising 60 feet high in the oval south of the White House. A choir from the Epiphany Episcopal Church and a brass quartet of the Marine Band gave a concert.” The write-up, however, also highlighted the discrimination of the time, as “the assembled multitude” first sang carols around 9:00 that evening, and a group of African-American singers were only able to hold their own segregated festivities later in the night. But the ceremony wasn’t started just to spread holiday cheer and Vermont pride. Library of CongressPresident Coolidge illuminating the community Christmas tree, which has been erected south of the White House. In fact, the brains behind the event hoped it would help spread electricity use throughout the country. Its mastermind, Frederick M. Feiker, assistant to the Secretary of Commerce Herbert Hoover and former technical journalist for General Electric (GE), described his light bulb moment to his daughter Janet a decade later in a March 8, 1932, letter: The Society for Electrical Development was interested to have as many people use electric lights at Christmas time as possible, so I thought of this idea of having the National Christmas Tree at Washington, which would stimulate other people to have outdoor Christmas trees. In order to get this started, we had to get the President of the United States to light the tree. If you get the President of the United States two years in succession to do a thing, he will always do it. So $5,000—that’s $70,680.99 in 2016 dollars—was collected to install underground lighting cables for the tree’s red, white and green bulbs. And living up to his nickname “Silent Cal,” Coolidge “refused to speak, but he did agree to push the button,” Feiker said. (He also nearly scuttled the 1924 ceremony with his reluctance to cut down a tree, but agreed to the idea if they used a living tree instead.) Get your history fix in one place: sign up for the weekly TIME History newsletter While the electrification of the country was underway well before 1923, the ’20s were the “tipping point decade,” as Amity Shlaes, author of Coolidge and chair of the board of the Calvin Coolidge Presidential Foundation, puts it. In 1920, 35% of homes had electricity, and by 1930, 68% did. The Economic History Association estimates that 70% of manufacturing activity relied on electricity by 1929, up from 30% in 1914. Urban homes and businesses were powered by electricity before many rural areas, many of which wouldn’t get access until the Rural Electrification Administration was created under the New Deal. Looking back, the 1923 tree lighting was also in sync with other trends in that period, historians say. “The 1920s were a decade of advertising, copywriters, punchy prose, tabloid journalism with splashier photography displays, so we’re getting this visual culture, and both [Presidents] Harding and Coolidge recognized the publicity value of a photo op,” says David Greenberg, author of Calvin Coolidge and a professor of History and of Journalism & Media Studies at Rutgers University. “So it’s easy to imagine the White House tree lighting ceremony was just sort of part of this proliferation of public events at which you get a nice photo in the newspaper for this kind of easy stunt.” Combine that trend with the glitzy Jazz Age, says historian David Pietrusza, author of several books on Coolidge, and the tree-lighting ceremony fits right in with “the Roaring Twenties—when everything about American society seem to glitter and flicker with a flame never before witnessed.” […]

You don’t need a skillet to cook fabulous eggs

Learn how to prepare this breakfast favorite using other tools in your kitchen. The results will amaze you. […]

Photo: Weedy seadragon hides in the sea weeds

Our photo of the day celebrates this ever-wonderful cousin of the seahorse. […]