[["A troll is a class of being in Norse mythology and Scandinavian folklore. In Old Norse sources, beings described as trolls dwell in isolated rocks, mountains, or caves, live together in small family units, and are rarely helpful to human beings.", 48.0], ["In Norse mythology, trolls are said to dwell in isolated mountains, rocks, and caves, sometimes living together, usually as father-and-daughter or mother-and-son pairs, and are rarely described as helpful or friendly.", 39.0]]
where did the myth of trolls originate
history