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Apr 2024
2m 1s

L’expansion de l’univers ralentit-elle ?

Choses à Savoir
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Pourquoi les personnes âgées sentent-elles différemment ?
Longtemps, cette idée a relevé du cliché ou du malaise social. Pourtant, la science a fini par montrer qu’il existe bien une base biologique objective à ce phénomène. Des chercheurs japonais ont identifié le composé chimique principalement responsable de cette odeur particulière, ... Show More
1m 45s
Mar 11
Qu’est-il vraiment arrivé à la bibliothèque d’Alexandrie ?
La bibliothèque d’Alexandrie est devenue le symbole absolu du savoir perdu. Mais contrairement à la légende, elle n’a probablement pas été détruite en une seule nuit par un incendie spectaculaire. Ce qui lui est arrivé est plus complexe, plus lent… et finalement plus humain.La bi ... Show More
2m 33s
Mar 10
Pourquoi le chimiste Alfred Nobel est-il célèbre ?
Alfred Nobel est célèbre pour les prix Nobel. Bien sûr ! Mais au départ, sa célébrité vient bien d’un explosif précis : la dynamite.Nobel naît en 1833 à Stockholm, dans une époque où l’Europe construit tunnels, voies ferrées, ports et canaux. Le problème, c’est que faire sauter l ... Show More
2m 26s
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