Jutting out from a snow-capped hillside and teetering on the edge of the habitable world is a concrete bunker holding the key to the entire world's food supply.
Svalbard Seed Vault holds seeds for more than 1.1m types of plant, tree and crop in the event of species becoming extinct or wiped out by natural or preventable disasters.
It means that, if vital crops were to disappear, we'd be able to re-grow them and prevent starvation. A grim and apocalyptic concept, but increasingly important as the planet sees the impacts of climate change.
