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Timeline of World History - Category:History timelines — Wikimedia Commons Mise au point d'une batterie rechargeable en une minute Des scientifiques américains disent avoir mis au point, grâce à l'aluminium, une batterie moins chère, plus écologique, plus endurante et pliable qui pourrait permettre de recharger les smartphones en une minute. Les chercheurs, qui détaillent leur découverte dans la revue scientifique Nature, assurent que la nouvelle batterie à base d'aluminium-ion a le potentiel de remplacer les batteries lithium-ion utilisées dans des millions d'ordinateurs portables et de téléphones mobiles. Outre une recharge plus rapide, la nouvelle batterie est également plus sûre que les modèles actuels, parfois sujets à des risques de surchauffe et potentiellement inflammables, ajoutent les chercheurs. Les chercheurs tentent depuis des années de mettre au point une batterie à base d'aluminium, un matériau léger et relativement peu coûteux doté d'une grande capacité de recharge. Des utilisations potentielles pour les énergies renouvelables

Godlike Great Programmers: The Scientists Arguing for Religious Belief The relationship between science and religion has always been vexed. Most scientists I know are nonbelievers, convinced that there is no deity, or at least that there is no convincing evidence of one. Even those who are believers, like Francis Collins, director of the National Institutes of Health, see their religion and their science as largely separate. (“If God is outside of nature, then science can neither prove nor disprove his existence,” he once wrote.) But it has been startling to see leading scientists employ science itself in arguments for believing in a kind of supernatural: Jürgen Schmidhuber, a prominent researcher in artificial intelligence, calls for what he has dubbed “computational theology,” while Baylor College of Medicine neuroscientist David Eagleman has proposed a kind of religious perspective that he calls “Possibilianism.” Eagleman aims to “make the case that our ignorance of the cosmos is too vast to commit to atheism.” Illustration by Guy Billout.

64 Things Every Geek Should Know « If you consider yourself a geek, or aspire to the honor of geekhood, here’s an essential checklist of must-have geek skills. The term ‘geek’, once used to label a circus freak, has morphed in meaning over the years. What was once an unusual profession transferred into a word indicating social awkwardness. As time has gone on, the word has yet again morphed to indicate a new type of individual: someone who is obsessive over one (or more) particular subjects, whether it be science, photography, electronics, computers, media, or any other field. A geek is one who isn’t satisfied knowing only the surface facts, but instead has a visceral desire to learn everything possible about a particular subject. A techie geek is usually one who knows a little about everything, and is thus the person family and friends turn to whenever they have a question. 2. If you rolled your eyes here, that is a good thing. 1. 3. 4. 5. 6. 7. 8. 9.

History and Geography of Europe On a testé pour vous... L'hologramme fait maison en dix minutes chrono Ou comment nous avons fait d'un iPad un projecteur à hologrammes à l'aide d'une simple feuille de plastique. Le | • Mis à jour le | Par Morgane Tual Tout est parti de cette vidéo, montrant une figurine de Sangoku, le héros de la série Dragon Ball Z, prenant vie grâce à des hologrammes : Il n'en fallait pas plus pour susciter l'enthousiasme de la rédaction de Pixels, qui s'est empressée de faire passer cette information, primordiale, à ses lecteurs. Liste des ingrédients : Une tablette type iPadUne feuille de plastique transparente, assez rigide et brillanteUn cutterUn crayon à papierDu ruban adhésif Première – et unique – difficulté : se souvenir de ses cours de géométrie pour dessiner, sur la feuille de plastique, un patron à découper afin de fabriquer la pyramide à ces dimensions : A noter que ces dimensions fonctionnent pour une tablette de type iPad, mais pas pour un smartphone par exemple. A partir de là, deux écoles s'affrontent. Défi réussi ! Nos vidéos préférées :

History of Whole Earth Catalog The WHOLE EARTH CATALOG was published regularly from 1968 to 1972, but only intermittently thereafter. During its four years of regular publication, the Catalog earned a reputation, a following, and a National Book Award, the only time a catalog has been so honored. Standing with one foot firmly in the rugged individualism and back-to-the-land movements of the Sixties counterculture and the other in the nascent global community made possible by the Internet, the WHOLE EARTH CATALOG offered an integrated, complex, challenging, thought-provoking, and comprehensive worldview. Founder Stewart Brand, in his 1968 CATALOG article, "We are as gods" said, "At a time when the New Left was calling for grass-roots political (i.e., referred) power, Whole Earth eschewed politics and pushed grassroots direct power—tools and skills. Stewart attempted to cease pubication numberous times, only to see a new catalog, book, or magazine pop up from somewhere. You can view them as Flipbooks.

Category:Historiography Historiography is the study of historians and their work. It is writing about rather than of history. Historiography is meta-level analysis of descriptions of the past. The analysis usually focuses on the narrative, interpretations, worldview, use of evidence, or method of presentation of other historians. Subcategories This category has the following 10 subcategories, out of 10 total. Pages in category "Historiography" The following 117 pages are in this category, out of 117 total.

Ma propre énergie | Accueil Why Pay More? by Peter Singer Exit from comment view mode. Click to hide this space PRINCETON – When Radosław Sikorski, Poland’s foreign minister, went to Ukraine for talks last month, his Ukrainian counterparts reportedly laughed at him because he was wearing a Japanese quartz watch that cost only $165. A Ukrainian newspaper reported on the preferences of Ukrainian ministers, several of whom have watches that cost more than $30,000. Even a Communist member of Ukraine’s parliament, the Rada, was shown wearing a watch that retails for more than $6,000. The laughter should have gone in the opposite direction. That is what the Ukrainians have done. Why would any wise shopper accept such a bad bargain? Thorstein Veblen knew the answer. Wearing a ridiculously expensive watch to proclaim that one has achieved an elevated social standing seems especially immoral for a public official in a country where a significant portion of the population still lives in real poverty. Of course, we all have our little indulgences.