Level 5 planet: Difference between revisions

While a [[level 2 planet]] in the [[1940s]], ([[PROSE]]: ''[[Ghosts of India (novel)|Ghosts of India]]'') [[Earth]] became a level 5 civilization by [[1957]], ([[PROSE]]: ''[[First Frontier (novel)|First Frontier]]'') remaining at that status through [[1979]], ([[TV]]: ''[[City of Death (TV story)|City of Death]]'') [[2008]], ([[TV]]: ''[[Voyage of the Damned (TV story)|Voyage of the Damned]]'', ''[[Revenge of the Slitheen (TV story)|Revenge of the Slitheen]]'', ''[[The Eleventh Hour (TV story)|The Eleventh Hour]]'') [[2009]], ([[TV]]: ''[[Partners in Crime (TV story)|Partners in Crime]]'') [[2016]], ([[PROSE]]: ''[[What She Does Next Will Astound You (novel)|What She Does Next Will Astound You]]'') and into [[2040]]. ([[AUDIO]]: ''[[Phantoms of the Deep (audio story)|Phantoms of the Deep]]'') However, [[Romana I]] once referred to Earth  in [[2011]] as having a [[Level 4 planet|level 4 civilization]]. ([[AUDIO]]: ''[[Ferril's Folly]]'')