Midgard, in Norse mythology, the Middle Earth, the abode of mankind, made from the body of the first created being, the giant Aurgelmir (Ymir). According to legend, the gods killed Aurgelmir, rolled his body into the central void of the universe, and began fashioning the Midgard. Aurgelmir’s flesh became the land, his blood the oceans, his bones the mountains, his teeth the cliffs, his hair the trees, and his brains (blown over the earth) became the clouds. Aurgelmir’s skull was held up by four dwarfs, Nordri, Sudri, Austri, and Vestri (the four points of the compass), and became the dome of the heavens. The sun, moon, and stars were made of scattered sparks that were caught in the skull.
Midgard is situated halfway between Niflheim on the north, the land of ice, and Muspelheim to the south, the region of fire. Midgard is joined with Asgard, the abode of the deities, by Bifrost, the rainbow bridge.