For centuries, the spiralled tusks of the narwhal, brought south by Nordic traders, circulated across Europe as genuine unicorn horns — sold for immense sums in royal courts and credited with magical powers. The real origin of these tusks, the long spiralled tooth of an Arctic whale, was only established much later.
A monstrous creature said to be able to swallow entire ships whole, the Kraken has haunted Scandinavian sailors' tales for centuries. The giant squid, long unknown alive and sometimes found stranded or hauled up by fishermen, is now considered its most likely origin: its already impressive real size was amplified by fear and imagination through generations of storytelling.