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Our sense of smell - or olfaction as it is technically known - is our most enigmatic sense. It can conjure up memories, taking us back to very specific places and emotions, whilst powerful smells can induce strong feelings of hunger or nausea. In the animal kingdom smell can be used to find food, a mate, or a home; to sense danger; and to send and receive complex messages with other members of a species. Yet despite its fundamental importance in our mental life and in the existence of all animals, our scientific understanding of how smell works is limited.

The Arctic is demanding global attention. It is warming, melting, and thawing in a manner that threatens fundamental state-change. For communities that call the Arctic 'home' this is unwelcome. A warming Arctic brings with it the spectre of costly disruption and interference in indigenous lives and communal welfare. For others, the disappearance of sea ice makes the Arctic appear more accessible and less remote. This also brings with it dangers such as the prospect of a new era of great power rivalries involving China, Russia, and the United States. Submarine and long-range bomber patrolling are now commonplace. New terms such as 'global Arctic' are being used to capture the dynamic of change while others muse about the 'return of a Cold War'.