简介： The first episode traces the development of the four rocky planets in our solar system : Mercury, Ve苍井空教师qvodnus, Earth and Mars. They were born at the same time from the same material, yet have gone entirely differe老师videosgratis tvnt paths. What forces are at work behind it? Why has Earth thrived whilst the others have faded away? Advanced space missions rev合肥艳照门eal the moments when the fate of these worlds turned.
