A series in which Professor Robert Winston examines how the body has evolved.

Puberty is a time of phenomenal change within the human body, as a host of hormones charge through the bloodstream, forcing drastic new developments. Today's programme follows 12-year-old Beatrice over 18 months as she experiences the dramas of puberty.
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The Human Body 10.20pm BBC1
Having taken us from conception, through birth to infancy, Professor Winston's journey through the human body has arrived at puberty. And as long as you can ignore some of the cliches and analogies ("puberty is like a roller coaster": cue a windswept Winston on a roller coaster and "if living through puberty feels like a horror story, the villains of the piece are hormones, those chemical messengers beyond our control"), it all makes for interesting viewing.
As well as the by now familiar use of fibre optic cameras, thermal cameras (which provide the unique sight of an erection on television) and slow motion footage, the programme follows Beatrice over 18 months as she leaves childhood and enters adulthood.