Exobiologie

dure(2/3) L'apparition de la vie sur Terre

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  • mercredi 08 septembre 2010
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Quand la vie est-elle apparue sur Terre? Comment? La matière organique nécessaire est-elle tombée du ciel? Ou provenait-elle du fond des océans? Revue des hypothèses en compagnie de l'exobiologiste Hervé Cottin.

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Cellules souches et médecine régénératrice

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Mode d’emploi des cellules souches et perspectives offertes à la médecine, le tour du sujet avec Marc Peschanski, directeur de recherche à l’Inserm et directeur scientifique de l’I-Stem...

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Crise d'extinction

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La planète n’a pas connu de crise d’extinction aussi grave depuis 65 millions d’années. Depuis la disparition des dinosaures. L’analyse de Florian Kirchner, du Comité français de l’Union internationale pour la conservation de la nature, à la lumière de la dernière liste rouge de l’UICN. Sombre tableau…

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Où est passé Néandertal ?

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Si l’on sait aujourd’hui que l’homme de Néandertal n’est pas l’ancêtre de l’homme (mais un cousin éloigné du genre Homo), beaucoup de questions subsistent en revanche sur la manière dont il a vécu et sur sa disparition. Les réponses de Jean-Luc Voisin, Docteur en paléontologie humaine.

(1/3) L'alchimie de la vie | neopodia 2009 | © DR. NASA | Courtesy of nasaimages.org
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Exobiologie

dure (1/3) L'alchimie de la vie

Comment la matière peut-elle se transformer en organisme vivant? Quel processus chimique conduit à l'apparition de la vie? Carbone, eau, hydrogène, azote... quels sont les ingrédients indispensables? La science avance mais le mystère reste entier. Explications de l'exobiologiste Hervé Cottin.

Version médiane | neopodia 2009 | © Antonio Rivas, iberian links x-situ conservation program | UICN
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Crise d'extinction

dure Version médiane

La planète n’a pas connu de crise d’extinction aussi grave depuis 65 millions d’années. Depuis la disparition des dinosaures. L’analyse de Florian Kirchner, du Comité français de l’Union internationale pour la conservation de la nature, à la lumière de la dernière liste rouge de l’UICN. Sombre tableau…

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