background preloader

The National Academies

The National Academies
In the News: Your Inner Fish – A Scientific Adventure Have you ever wondered why people look the way they do? Why our hands and feet have five digits instead of six? Why we stand on two legs instead of four? Follow that adventure now on PBS Darwin's Insights Continue to Inspire the Academy's Work The ideas of Charles Darwin and the concept of evolution by natural selection continue to have a profound influence on modern biology – they permeate almost every area of scientific exploration. In 2009 the National Academy of Sciences joined many other organizations in the international scientific community to celebrate the 'Year of Science,' which commemorated Darwin’s 200th birthday and the 150th anniversary of the publication of his masterwork On the Origin of Species. In 2010, the National Academy of Sciences awarded its most prestigious award, the Public Welfare Medal, to Dr.

Archaeology, Anthropology, Ancient Civilizations The Illustrated Guide to Epigenetics Illustrations by Joe Kloc This month marks the ten-year anniversary of the sequencing of the human genome, that noble achievement underpinning the less noble sales of 23andMe's direct-to-consumer genetic tests. To commemorate the scientific occasion, we've created an illustrated introduction to one subfield of genetics likely to produce even more dubious novelty science projects someday: epigenetics. What is epigenetics? Human life begins as a single cell equipped with all of the genetic information—known as the genome—it will need to develop into a full-grown adult. FIGURE 1: Through a process called mitosis, a single cell (A) splits into two cells (B) with identical genetic information. FIGURE 2: DNA coils around proteins called histones, forming a nucleosome. How does the epigenome work? Molecular "caps" called methyl groups can be attached to genes in order to effectively block them from giving instructions to the cell (FIGURE 3). Where do the different epigenomes come from? - environment, biodiversity, genomics, biot Charles Darwin Spotlight | Learn Science at Scitable Like so many great scientists, Charles Darwin was first drawn to science as a young boy by his intense interest in the diverse animals and plants that filled his surroundings. Later, despite his father's urgings to pursue a career in medicine, young Darwin found himself drawn to careful, empirical observation of nature, particularly through his cherished hobby of collecting beetles. His empirical instincts were further developed at the University of Cambridge through deep study under contemporary naturalists, such as John Stevens Henslow, founder of the Cambridge University Botanic Garden (1831), and through reading progressive philosophers, such as William Paley, author of Natural Theology (1802). By the time he was serendipitously invited to accompany Captain Robert FitzRoy on a voyage of the HMS Beagle, Darwin had become an astute and insatiable scientist, primed for significant discoveries. Who could have imagined how significant his discoveries would be?

Un nouveau pas vers la connaissance universelle (2) - Miscellané Après la mise en ligne récemment par le MIT de l'intégralité de ses cursus gratuitement, et après le projet Wikipédia bien sûr, un autre grand projet est lancé, qui intéressera essentiellement ceux qui travaillent dans le monde du vivant puisqu'il ne se propose pas moins que de constituer une encyclopédie des espèces animales connues - disparues ou contemporaines - en ligne et encore une fois gratuite. Le projet Encyclopedia Of Life a pour origine des universitaires américains de la côte Est, le financement d'une fondation et de dons, tout est clairement expliqué dans leur FAQ. Le projet se veut collaboratif, mais exclusivement créé, vérifié et mis à jour par des scientifiques volontaires, permettant par rapport à Wikipédia une précision et une justesse quasi totale des informations disponibles sur les diverses espèces. Encore une fois, la France est complètement larguée, par manque de volonté mais aussi de réactivité dans un domaine ou tout est en train de se faire.

International Darwin Day Foundation Cartes d' Europe: atlas géographique et historique accompagné de Biodiversity Heritage Library Current Book List General Index Search Charles Darwin's Library Charles Darwin’s Library is a digital edition and virtual reconstruction of the surviving books owned by Charles Darwin. This BHL special collection draws on original copies and surrogates from other libraries. It also provides full transcriptions of his annotations and marks. In this first release (2011) we provide 330 of the 1480 titles in his library, concentrating on the most heavily annotated books. more... How to use Charles Darwin's Library A Darwin’s Library transcription pane faces each page that Darwin marked or wrote notes on. Entries in the pane have line numbers, such as lines 5-7. In books scanned from Darwin’s personal copies you will see his writing. Click the banner to reach the Current Book List and the General Index. The pane uses a very few specialized terms and symbols: The transcription pane uses special characters to represent some elements of Darwin's annotations. Support United Kingdom United States

Maps The section of the Sourcebook is devoted to copy-permitted maps and images. These images can be used in teaching, and in web page creation. The source of images is indicated for each image. © This text is copyright. The specific electronic form, and any notes and questions are copyright. Permission is granted to copy the text, and to print out copies for personal and educational use. If any copyright has been infringed, this was unintentional.

Origins by Lucas Laursen Charles Darwin may have had his biggest impact on biology, but he began his scientific career as a geologist. So it’s appropriate that earlier this year, retired geologist John Ramsay, who had long studied the famed biologist’s life, accepted a commission to compose a Darwin-themed string quartet. Darwin “did some pretty fundamental geological mapping," says Ramsay, drawing a parallel to his own geological career, during which he has drawn maps of the Scottish Highlands, South Africa, and the Swiss Alps. At the beginning of the piece, a disorganized Earth takes shape, with the core, mantle, and crust emerging into distinct musical themes. Performed by the Fitzwilliam String Quartet, Ramsay’s composition premiered in Cambridge, U.K., during the Darwin Festival (Ramsay pictured above and Quartet playing pictured below) on 7 July 2009. When his tour was over, Ramsay had to decide between pursuing music or geology. And what would Darwin have thought of the composition?

Le Mag Voyages vous emmène à l'Île d'Aix C'est une toute petite île coincée entre Ré et Oléron, en Charente-Maritime Il n'y a pas de voitures, l'Île est battue par les vents mais largement ensoleillée. Vous en faites le tour en quelques heures. Respectueuse de l'environnement, Aix se trouve sur les grandes voies de migration des oiseaux. Des monuments historiques comme le fort Liédot racontent l'histoire de France. LÎle fut aussi la dernière demeure de Napoléon avant son départ pour Sainte-Hélène. Le site officiel de l'Île d'AixLe site du tourisme dans le pays rochefortaisLes horaires de bac pour l'Île d'AixDes photos de l'Île d'Aix Une idée de séjour insolite La "Casa Anus" en Belgique

The Beagle Project Blog: Pics in space One of the most exciting science projects we plan to do aboard the new Beagle is to correlate ocean surface biological surveys with images of our position taken at the same time by our astronaut friends aboard the International Space Station. The premise of such a study got a big boost this week when Nature published special News Features and Commentaries on earth monitoring. The issue includes an essay by Stewart Brand of the Long Now Foundation. Way back in 1966 Brand promoted 'the idea of photographing the "whole Earth" from space, hoping that it would stimulate humanity's interest in its mega-habitat.' And oh, how it did. Two years later, in December 1968, Apollo 8 astronauts Frank Borman, Jim Lovell and William Anders became the first humans to leave Earth orbit and travel far enough away to see and photograph our fragile planet in the round. On Christmas Eve, they transmitted the first images of the whole Earth that anyone had ever seen.

Index - Accueil