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Claude Hagège
Music or Death The language of music explained by an eminent linguist
Music does indeed have a strong message to convey
Raphaël Hadas-Lebel
The Future of France’s Fifth Republic and Its Institutions in 18 Questions
Should France abandon the five-year presidential term? Should it proscribe political cohabitation (following the failure of the presidential party to acquire a parliamentary majority)? Is a second chamber necessary? How can the Constitutional Council be made to evolve?
Étienne Guyon, Jean-Paul Troadec
From a Bag of Marbles to a Heap of Sand
Why don't sand dunes collapse? How does sand flow in an hourglass? How is it possible to empty a silo of all its wheat? What's a ceramic? The answer to all these questions can be found in the science of the complex organizations of matter, a science which is pluridisciplinary. Étienne Guyon, head of the École Normale Supérieure, and Jean-Paul Troadec, a researcher, present the characteristics of grain matter, the rules by which it is organized (in both crystal and fluid) as well as its movements (in silos as in avalanches).