Jason Mohammad19/10/2012BBC Radio Wales Duration: 3 hoursFirst broadcast: Fri 19th Oct 2012, 10:00 on BBC Radio Wales ExtraLatest broadcast: Fri 19th Oct 2012, 10:00 on BBC Radio Wales FMJason's guest is neuropsychologist Dr David Lewis, who reveals the science behind the perfect pint!GenresEntertainmentFormatsDiscussion & TalkBrandJason Mohammad Source: BBC Online