Uranus and Neptune: The Mystery of the Ice Giants

In Uranus and Neptune: The Mystery of the Ice Giants, narrator Ruth Wilson explores the turbulence during the teenage years of our Solar System and the connection between the craters on the Moon and the position of Neptune and Uranus. During the late heavy bombardment, icy objects hitting the moon eventually also changed the orbit of the planets, including scattering Uranus and Neptune far from where they originally formed. This video is excerpted from BBC's Horizon: Secrets of the Solar System, a series that looks at how new planets being discovered are forcing scientists to rewrite the history of our own Solar System.