David Attenborough's Natural CuriositiesSeries 1Episode 4: A Curious TwistBBC Two Duration: 25 minutesFirst broadcast: Fri 15th Jul 2016, 13:00 on BBC Two EnglandLatest broadcast: Sat 12th Sep 2020, 14:25 on BBC Two Wales HDWhy the spiral is so important to two very different animals.ContributorsPresenter:David AttenboroughDirector:Hilary JeffkinsProducer:Hilary JeffkinsDirector:Sharmila ChoudhuryProducer:Sharmila ChoudhuryExecutive Producer:Stephen DunleavyProduction Company:Humble Bee FilmsGenresFactualScience & NatureNature & EnvironmentFormatsDocumentariesBrandDavid Attenborough's Natural CuriositiesSeriesDavid Attenborough's Natural Curiosities: Series 1 Source: BBC Online