Endless blue stretches in every direction. The sea bed is a staggering eight kilometres deeper down and the nearest island is 500 kilometres away. There is nothing save the burning sun above and the blackened abyss below. How, then, does life exist?
The unique features of the single spiral tusk of the narwhal has inspired tales of unicorns, and the twist of the snail shell has delighted and fascinated naturalists and artists since the dawn of civilisation.