Listen now 30 mins
Stewart Henderson presents another sparkling series of Questions Questions - the programme which offers answers to those intriguing questions of everyday life, inspired by current events and popular culture.
Each programme is compiled directly from the well-informed and inquisitive Radio 4 audience, who bring their unrivalled collective brain to bear on these puzzlers every week.
In this week's programme Stewart looks into why the swallow sometimes flies high and sometimes low - and does its choice of altitude really predict the weather? Questions about jewellery made of hair are answered by a Swedish hair jewellery expert and a listener has their query about the strange phenomenon of 'green eye' when photographing pets answered. And, guaranteed to start you scratching, Stewart finds out about new developments to see off nits with lethal efficiency.
Producer: Kate Taylor
A Whistledown Production for BBC Radio 4.