First time as the opponent at a Swedish viva, Tjarno, on speciation and inversions in snails. Memorable field/snail trip yesterday, to Ursholmen islands, helped by gorgeous weather and warm sea. "Viva" v. different from UK equivalent, quite a lot of pros, and few negatives (except the £!). #genomics#littorina#snails#sweden#phd#viva#Speciation