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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 : Oct 30, 1983
Last Air date : Mar 20, 2020
Episode : 543 Episode
Season : 39 Season
Runtime: 60:14 minutes
Studio: BBC Two
Country: United Kingdom, France