Étienne Klein Que savons-nous du temps ?
Étienne Klein (CEA)
11 mai 2006
Enregistrement filmé à l’École polytechnique
vidéo ENS
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![[79] Masse négative, énergie noire et Stargates / Negative mass, dark matter and Stargates-subtitled](https://sun9-78.userapi.com/CE-zip9qFwicpC0CsCIxXEQgIEGik_BscymxGw/7jdlaMXSiUE.jpg)
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![⁉️[Étienne Klein] Finalement, qu’est-ce que le vide ?](https://sun9-6.userapi.com/O7QptsypUhIE37NFPlBDAgJPHbfiBrzXfcHO5A/80DuTq0T5oI.jpg)
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