 The series was announced by the BBC in 2013 with the working title "One Planet", but the title was later changed to "Planet Earth II".The BBC trailer for the series used the same music featured in the trailer for the original "Planet Earth", "Hoppípolla" by Icelandic post-rock band Sigur Rós.The original "Planet Earth", airing in 2006, was one of the first natural documentary series to be made in high definition (HD) and "Planet Earth II" utilised new technologies developed since the first series, including ultra high definition (4K), improved camera stabilisation, remote recording and aerial drone technology.