According to an ancient Hindu myth the goddess Earth was once imprisoned at the bottom of the ocean, in the nether world, by a demon who had laid waste to the earth, causing havoc to the order of things. To rescue her from the demon, Lord Vishnu incarnated as a boar, as Varaha Avatar. He fought and killed the demon and released the goddess Earth by carrying her on his tusk to float free once more on the cosmic waters.
Kumar, Sehdev and Mehndiratta, Aaloka
"Environmental Ethics: Ancient Traditions and Contemporary Dilemmas: A Hindu Perspective,"
Journal of Hindu-Christian Studies:
Vol. 6, Article 9.
Available at: http://dx.doi.org/10.7825/2164-6279.1078