El país de los pájaros que duermen en el aire

Humanity's understanding of the physical world is full of gaps. Not tiny little gaps you can safely ignore -- there are huge yawning voids in our basic notions of how the world works. Jorge Cham and Daniel Whiteson team up to explore everything we don't know about the universe, and while introducing the biggest mysteries in physics, they also helpfully demystify many complicated things we do know. And although the universe is full of weird things that don't make any sense, Cham and Whiteson make a case that the questions we can't answer are as interesting as the ones we can, and they invite...

Galaxies have a history. This has become clear from recent sky surveys which have shown that distant galaxies, formed early in the life of the Universe, differ from the nearby ones. New observational windows at ultraviolet, infrared and millimetric wavelengths (provided by ROSAT, IRAM, IUE, IRAS, ISO) have revealed that galaxies contain a wealth of components: very hot gas, atomic hydrogen, molecules, dust, dark matter ... A significant advance is expected due to new instruments (VLT, FIRST, XMM) which will allow one to explore the most distant Universe. Three Euroconferences have been...

Estudi que analitza quines respostes s'estan donant des de les diferents administracions del territori per afrontar velles dinàmiques territorials crítiques com el despoblament rural, la dispersió i explosió urbana, la crisi industrial i del sector primari, l'esgotament del recurs aigua, la depredació del litoral i la pèrdua de paisatges, entre d'altres a unes àrees d'estudi que es poden considerar com a representatives de tots els tipus de territoris que podem trobar hui en dia l'Arc Mediterrani. s'abasta un àmbit tan heterogeni com és el litoral que recorre Catalunya, País...

Este libro presenta una serie de art culos de diferentes autores organizados alrededor de temas y problemas de la historia y la filosof a de la biolog a contempor nea. En particular, a trav s del contraste de diversos puntos de vista, intenta aproximarse a una serie de problemas que surgen al reflexionar acerca de los sentidos en los que la teor a de la evoluci n, y por ende, una buena parte de la biolog a contempor nea, puede entenderse como una ciencia hist rica.