Burger's Sphereland that dealt with the topics of curved spaces, symmetry and congruence, an expanding universe, and the multiverse. Actors Kristen Bell, Danny Pudi, Michael York, Tony Hale, Danica McKellar, and Kate Mulgrew provide voices for the 36-minute animated movie. See also Fourth dimension Flatterland, another sequel to Flatland References 1965 novels 1965 science fiction novels Dutch novels adapted into films Fictional dimensions Novels about mathematics Sequel novels