background preloader


Facebook Twitter

17 Top Female Scientists Who Have Changed the World. President Barack Obama presents the Presidential Medal of Freedom to NASA mathematician Katherine G.

17 Top Female Scientists Who Have Changed the World

Einstein ou l’art de dépasser les limites du monde observable. 11 common traits of highly intelligent people. Over on Quora, more than 100 people have answered the question "What are the common traits of highly intelligent people?

11 common traits of highly intelligent people

" Some users claim to know from personal experience (so humble); others are just taking an educated guess. As it turns out, many users gave answers that researchers would agree with. We pulled eleven of the most intriguing Quora responses and explained the science behind them. How Could You Survive This Ancient Suicide Pact Puzzle? The Josephus problem is a puzzle dreamed up by a Jewish soldier nearly 2,000 years ago that continues to test the minds of mathematicians and computer scientists to this day.

How Could You Survive This Ancient Suicide Pact Puzzle?

Fortunately, Numberphile is here to explain it all. This theoretical mind-game is said to have been created by Jewish historian Flavius Josephus in the 1st century CE during the Roman Siege of Yodfat. The story goes that he was sitting in a circle with 40 other Jewish soldiers. With the pissed off Roman soldiers outside, they decided to commit to a death-pact in which they stabbed the person to their left. Scientists Have Broken A New Nuclear Fusion Record. Hollywood has made us wary of the last day before retirement, but for the MIT’s fusion reactor its final 24 hours of operation were some of its best.

Scientists Have Broken A New Nuclear Fusion Record

The reactor was able to produce plasma with 2.05 atmospheres of pressure for the first time, a major breakthrough in nuclear fusion research. The Alcator C-Mod reactor has been in operation for 23 years and it had set the previous record of plasma pressure (1.77 atmospheres) in 2005. The plasma in the record-breaking event reached a temperature of 35 million °C (63 million °F) and was contained by a magnetic field 144,000 times stronger than the magnetic field of our planet.

Nuclear fusion reactors aim to govern the power that makes stars shine. Les enfants doivent leur intelligence à leur mère, c’est scientifiquement prouvé. C’est l’info « scientifique » qui va faire grincer les dents des pères de famille, mais qui nous a bien fait rire.

Les enfants doivent leur intelligence à leur mère, c’est scientifiquement prouvé

Votre enfant brille par son intelligence ? Sachez-le, d'après une étude scientifique relayée dans la revue américaine Psychology Post, tout ça, c’est grâce aux mamans. The 7 biggest problems facing science, according to 270 scientists. Science is in big trouble.

The 7 biggest problems facing science, according to 270 scientists

Or so we’re told. In the past several years, many scientists have become afflicted with a serious case of doubt — doubt in the very institution of science. As reporters covering medicine, psychology, climate change, and other areas of research, we wanted to understand this epidemic of doubt. Why Zero Is So Ridiculously Important. Zero is a strange beast.

Why Zero Is So Ridiculously Important

It took until the 7th century for it to be explicitly recognized as a number in its own right, when the ancient Indians developed a numerical system that expressed zero with its own symbol. Since the development of this number system, which we still use today, zero has been instrumental in our exploration of mathematics. Le génie, une affaire de créativité. Pour comprendre ce qu’est un "haut potentiel créatif", direction le Laboratoire adaptations travail-individu (Lati) de la faculté de psychologie Paris-Descartes, à Boulogne-Billancourt (Hauts-de-Seine), au cinquième étage du bâtiment principal.

Le génie, une affaire de créativité

C’est le repaire de Todd Lubart, son directeur, psychologue américain débarqué de New York en 1994 et spécialiste de la créativité depuis les années 1980. Son credo : la créativité existe en chacun de nous. Voiture autonome : un talentueux hacker fait mieux que Tesla en seulement 3 mois. Un patron français classé derrière Jobs et Zuckerberg. Bertin Nahum, patron de Medtech, une TPE montpelliéraine, vient d'être classé quatrième entrepreneur le plus plus révolutionnaire au monde.

Un patron français classé derrière Jobs et Zuckerberg

Les maths, les lettres et l’alcool de poire de Grothendieck. Quand Alexandre Grothendieck, aussi inconnu du grand public que célébré par le monde des mathématiciens, se retire à l’été 1991, dans un village des Pyrénées, il ne souhaite plus voir personne.

Les maths, les lettres et l’alcool de poire de Grothendieck

Théorie des catégories. Un article de Wikipédia, l'encyclopédie libre. Les catégories sont utilisées dans la plupart des branches mathématiques et dans certains secteurs de l'informatique théorique et en mathématiques de la physique. Elles forment une notion unificatrice. Cette théorie a été mise en place par Samuel Eilenberg et Saunders Mac Lane en 1942-1945, en lien avec la topologie algébrique, et propagée dans les années 1960-1970 en France par Alexandre Grothendieck, qui en fit une étude systématique. 10 Space Myths We Need to Stop Believing. Why you shouldn’t get your facts from Hollywood. 1. 21 GIFs That Explain Mathematical Concepts. “Let's face it; by and large math is not easy, but that's what makes it so rewarding when you conquer a problem, and reach new heights of understanding.” Danica McKellar As we usher in the start of a new school year, it’s time to hit the ground running in your classes!

Math can be pretty tough, but since it is the language in which scientists interpret the Universe, there’s really no getting around learning it. Top 10 Space Science Stories From 2014. 2014 has been a big year for space exploration - scientists landed on a comet, may have detected signals from the Big Bang and dark matter, extensively explored Mars - the list could go on and on. So here’s a collection of our favorite stories from the past year that will hopefully serve as a reminder of the incredible things that science has achieved. Orion Launch On December 5, NASA successfully completed its first test launch of the Orion capsule, a spacecraft designed to take humans deeper into space than ever before. In the future, when the craft is launched with NASA’s heavy-lift rocket, the Space Launch System, humans will eventually be able to reach exciting destinations such as asteroids and Mars. NASA's Marshall Spaceflight Center, via Flickr. What Are Those Strange Things You See Floating In Your Eye?

The Most Influential Scientist You May Never Have Heard Of. Gaze at Alexander Von Humboldt’s 1814 self-portrait and you peer into the eyes of a man who sought to see and understand everything. By this point in his life, at age 45, Humboldt had tutored himself in every branch of science, spent more than five years on a 6,000 mile scientific trek through South America, pioneered new methods for the graphical display of information, set a world mountain climbing record that stood for 30 years and established himself as one of the world’s most famous scientists, having helped to define many of today’s natural sciences.

Humboldt, born in Berlin, is sometimes called the last Renaissance man – he embodied all that was known about the world in his day. He spent the last three decades of his life writing Kosmos, an attempt to provide a scientific account of all aspects of nature. Alexandre Grothendieck. 50 Science Misconceptions. Bowling Balls Teach Principles of Physics With Pendulum Wave. Have some wood and 16 spare bowling balls on hand? Why not make a huge pendulum wave? Due to conservation of energy, a weight on a pendulum that is released will swing out and hit a point of equilibrium at about the same amplitude, and kinetic energy will cause the motion to continue on until it is eventually slowed by air resistance and friction from the pivot point.

However, period of the pendulum can be shortened by adjusting the length of the rod holding up the weight. The 25 Greatest Scientific Hoaxes In History. 10 Science Facts We Still Get Wrong. Common Misconceptions About Global Warming. Unbelievable Facts About Our Universe. Exoplanet covered in burning ice Gliese 436 b is a Neptune-sized exoplanet located about 33 light-years away in the constellation Leo. Astronomers believe that it embodies exotic states of water that causes its surface to be covered in burning ice. The pressure on the planet forces the ice to stay solid, but the extreme surface temperature of 570° F (300° C) superheats the water, causing it to come off as steam.

Principe du tiers exclu. Un article de Wikipédia, l'encyclopédie libre. En logique formelle, le principe du tiers exclu (ou « milieu exclu ») soutient que, pour toute proposition p, l'une ou l'autre parmi cette proposition p et sa négation non-p est vraie, c'est-à-dire que la disjonction « p ou non-p » est vraie. Logique intuitionniste. Simple But Mindblowing Helium Balloon Experiment. Newton’s first law of motion states that an object at rest will stay at rest, while an object in motion will stay in motion, unless acted upon by an unbalanced force. An easy way to demonstrate this is in the car. Google : "Au XXIe siècle, qui contrôle l’intelligence artificielle contrôle le reste"

Considéré comme un gentil moteur de recherche, Google est aujourd’hui en tête pour développer l’intelligence artificielle la plus développée au monde. Une IA plus performante encore que les capacités de l’être humain. Des images époustouflantes des civilisations et des peuples primitifs en voie de disparition ! Le photographe Jimmy Nelson entend garder trace de civilisations en passe de disparaître. Aux quatre coins du globe. C’est en visitant 35 de ces tribus plus ou moins célèbres que le reporter a pu dresser ce constat. Tout en tirant le portrait de nombreux autochtones pour des photos assez réussies. Les photos sont, il faut le dire, assez impressionnantes et glaçantes (on peut d’ailleurs acquérir le livre regroupant l’ensemble des clichés par ici).

Une fourmi ninja esclavagiste identifiée aux Etats-Unis. Comment un arbre mène des fourmis à l’esclavage. Howotmakeazombieant. La justice américaine doit déterminer si les chimpanzés sont des personnes. Nobel winner declares boycott of top science journals.