ezzy pearson, astrophysicist and space journalist. in norway, victor lund shammas, head of sociology and social work at the university of agder. thank you for joining us today. sylvia, in the past few years, commercial space tourism companies owned by billionaires have been making headlines for sending paying customers into space. how developed is commercial deep ocean exploration? why do people go into these extreme expeditions? >> i think it is an adventure. people have done adventures since humans are inhabiting the earth. i think it is one of the main reasons people aim for adventure. i think i am quite certain that this kind of tourism that has led now to this tragic loss of the titan is not helping learning more about the sea. we are looking into the impact of research and we are doing this to learn and understand the ocean and the ecosystem and not just to have a glimpse of some sea creatures down there. the deep ecosystem is very fragile, very cold, buried deep. everything is growing very slowly. it can easily be disturbed. no