Introduction

Mary roach is a journalist and author who has written some of the greatest popular science books in history. When feeling threatened, gulls practise a manoeuvre called defensive vomiting to offer it an alternative meal. The items that you have seen mary vomited up before include strawberry cake, larof mackerel, t yoavea  and spag bol. Dan shriber joins Andrew hunten, murray, james harkin and our very special guest, mary roachnd.