EN-4. Origins of life

Pierre-Henri Gouyon relies on an example - Dedale - to show the effects and the risks of a progress understanding which is only based on the technology.

Pierre-Henri Gouyon proposes a definition of the biodiversity. He relies on the diagram that Darwin published in 1859, in The Origin of Species. He insists on the dynamic balances of this biodiversity

Bruno David comes back to the main biodiversity crisis. He takes an inventory of the crisis for hundreds of million years and he discusses their potential factors of origin : oxygenation of the marine

In this first part, discover what are the biodiversity, its origins 3,8 billion years ago, and its evolution mechanisms, especially the extinction crisis of the main species. You will better

Pierre-Henri Gouyon comes back to different looks taken at nature and biodiversity during the last centuries. He insists on the fact that this biodiversity can't be reduced to a frozen group of

Marie-Christine Maurel explores the origins of life on earth. She highlights the main conditions 3 billion years ago, as well as the emergence of the first forms of life, which gave birth to the tree

Bruno David comes back to the main biodiversity crisis. He focuses on 2 aspects : the crisis recording and the exit from the crisis. Firstly, he explains that, contrary to what can be supposed, there

Gilles Boeuf proposes a definition of the biodiversity, this "living fraction of the nature in all its complexity". He relies on many examples, pictures, samples, and always points out the strong

In relation to the erosion of biodiversity, Gilles Boeuf presents arguments in favor of the upholding of this biodiversity: human health, technology innovation, bio-inspiration, or economy.

Gilles Boeuf comes back to the main stages of the history of life. He begins with the oceans, where life appeared over 3,5 billion years ago, mentions the lands conquest, and ends with the appearance

Gilles Boeuf reports the erosion of biodiversity and presents the four main factors which can be associated to this dynamics: destruction and pollution, resources overexploitation, species

Marie-Christine Maurel revient sur la formation des premières cellules vivantes à la surface de la terre. Elle s'appuie sur plusieurs grandes expériences qui, depuis un siècle, permettent de