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Jul 2025
1m 55s

Comment font les oiseaux migrateurs pour...

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Rediffusion - Où s’écrasent les météorites sur Terre ?
<p>Chaque jour, notre planète est bombardée par des milliers de météorites. Heureusement, la plupart sont de petites tailles et brûlent en entrant dans l’atmosphère. Mais celles qui survivent à cette descente infernale finissent par s’écraser quelque part sur Terre. Où exactement ... Show More
1m 52s
Mar 19
Rediffusion - Pourquoi la neige et la glace ne collent-elles pas à la fourrure des ours polaires ?
<p>Les ours polaires évoluent dans des conditions extrêmes où la glace et le froid pourraient être de sérieux handicaps. Pourtant, leur fourrure reste étonnamment sèche et exempte de givre. Comment est-ce possible ? La réponse réside dans un secret bien gardé : un sébum aux propr ... Show More
1m 53s
Mar 18
Rediffusion - Pourquoi peindre les avions en “peau de requin” ?
<p>Imaginez un avion recouvert d’une peau inspirée directement de celle du requin. C’est exactement ce que teste actuellement la compagnie Japan Airlines, en collaboration avec des chercheurs et des ingénieurs aéronautiques. Mais pourquoi s'intéresser à un tel revêtement inspiré ... Show More
1m 54s
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