How the Universe Works - Asteroids - Worlds that Never Were

Seizoen: 2 - Aflevering: 7 / 15 - Eerst uitgezonden: 22 augustus 2012 - Episode ID: 650002

From icy worlds with more fresh water than Earth to flying mountains of pure metal, asteroids shaped our past and promise much for the future. Could these enigmatic space rocks hold the key to how life in the Universe arises and is extinguished?