Narwhal The tusks were staples of the cabinet of curiosities. European knowledge of the tusk's origin developed gradually during the Age of Exploration, as explorers and naturalists began to visit Arctic regions themselves. The narwhal was one of two possible explanations of the giant sea phenomenon written by Jules Verne in his 1870 novel "Twenty Thousand Leagues Under the Sea". Verne thought that it would be unlikely that there was such a gigantic narwhal in existence. The size of the narwhal, or "unicorn of the sea", as found by Verne, would have been . For the narwhal to have caused the
Journey Through the Impossible "The Children of Captain Grant" and "Michael Strogoff", as similarly spectacular plays. Verne began playing with the idea of bringing a mixed selection of "Voyages Extraordinaires" characters together on a new adventure in early 1875, when he considered writing a novel in which Samuel Fergusson from "Five Weeks in a Balloon", Pierre Aronnax from "Twenty Thousand Leagues Under the Sea", Phileas Fogg from "Around the World in Eighty Days", Dr. Clawbonny from "The Adventures of Captain Hatteras", and other characters would go around the world together in a heavier-than-air flying machine. Another novel featuring a similar trip around the world