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La forêt primaire
durée : 00:54:48 - La Terre au carré - par : Mathieu Vidard - Il y a plus de 30 ans, le botaniste Francis Hallé se faisait connaître du grand public avec une invention géniale : le radeau des cimes, qui a permis à ce spécialiste des forêts tropicales d’observer la canopée.