06:30Science CafeScience at the 2018 Hay FestivalBBC Radio Wales Duration: 28 minutes Sun 27th May 2018, 06:30 on BBC Radio Wales FMAdam Walton previews some of the science events at this year's Hay FestivalGenresFactualScience & NatureFactualScience & NatureScience & TechnologyFormatsMagazines & ReviewsBrandScience Cafe Source: BBC Online