The first episode traces the development of the four rocky planets in our solar system : Mercury, Venus, Earth and Mars. They were born at the same time from the same material, yet have gone entirely different paths. What forces are at work behind it? Why has Earth thrived whilst the others have faded away? Advanced space missions reveal the moments when the fate of these worlds turned.《八大行星在线观看》由123电影www.123dyhd.com收集自网络发布。
