Giovanni Badino is one of the world's top ice cavers. Ice cavers spend their time inside giaciers - enormous walls of ice that travel very slowly down mountains. Oneof Giovanni's adventures took place on the Gorner glacier in Switzerland Europe's highest glacier. Giovanni Ied a team that expiored hundreds of metres down inside the glacier . They frequently had to swim through freezing pools and rivers of melting ice . Inside the glacier the ice is always moving so the team also faced the danger of the caves and tunnels falling in and yrapping them. Because of people like Giovanni we now know much more about what goes on inside glaciers.