Taking you out to the middle of the Arctic Ocean, where the MOSAiC expedition aims to revolutionise Arctic climate science. Each short episode begins with a single question. The answer weaves between the voices of scientists on board. Recording, production and music by Sam Cornish, a PhD student at the University of Oxford. This is a MOSAiC School outreach project, supported by IASC, MOSAiC, AWI, ARICE and APECS.