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Science23 août 2013
C'est le temps qui court
Les Etats-Unis mettent au point l'horloge la plus précise du monde
Elle est censée varier de moins d'une seconde en 13,8 milliards d'années.
Les Etats-Unis mettent au point l'horloge la plus précise du monde
Vu sur: Lu sur France Info