本页包含 宇宙 第 9 季的同步字幕——每一集、多种语言与发行版本。适合流媒体、下载与离线观看。
To our ancestors, the appearance of certain astronomical events meant something big and something bad was coming. They w...
Aired: Apr 18, 2015The ancients believed that the universe consisted of countless worlds we could not see, and argued endlessly over the na...
Aired: May 09, 2015