Quelle est réellement la place de la vie dans la chronologie de l'univers? 15 minutes pour tenter d’appréhender les échelles de temps cosmiques et nous poser la bonne question sur la vie extraterrestre! En savoir plus sur le paradoxe de Fermi, notamment les explications possibles: ...

If life exists elsewhere in the Universe, would we be able to communicate with it? In this clip from the 1977 CHRISTMAS LECTURES "The planets", Carl Sagan demonstrates how we could send a signal that would make sense to intelligent beings that have evolved independently from us. Subscribe for ...