Natural World - Season 3 Episode 6
What's the purpose of sex? To protect us from disease! Brian Leith unravels the intricate puzzle of sex and finds that: Males seem to be a waste of time and energy - many of the successful plants and animals (like the weeds in your garden) do without them altogether! Big animals - from polar bears to human beings - always have males as well as females - for a very good reason! The vital clue to the mystery lies in parasitism and infection. Out of the puzzle emerges a sparkling new theory of sex that looks set to keep biologists buzzing for years.
First Air Date : 1983-10-30
Last Air date : 2020-03-20
Runtime : 57 minutes
Genre : Documentary
Cast : David Attenborough, John Hannah, Juliet Stevenson
Crew : Brian Jackman (Writer), Andrew Graham-Brown (Director), Mike Birkhead (Director)
Quality :
Subtitles :
- Season 3 : Episode 11984-11-04
- Season 3 : Episode 21984-11-11
- Season 3 : Episode 31984-11-18
- Season 3 : Episode 41984-11-25
- Season 3 : Episode 51984-12-02
- Season 3 : Episode 61984-12-09
- Season 3 : Episode 71984-12-16
- Season 3 : Episode 81984-12-23
- Season 3 : Episode 91985-01-06
- Season 3 : Episode 101985-01-13
- Season 3 : Episode 111985-01-20
- Season 3 : Episode 121985-01-27
- Season 3 : Episode 131985-02-03
- Season 3 : Episode 141985-02-10
- Season 3 : Episode 151985-02-17