In Norse mythology, Nidhogg ("tearer of corpses") was the monster that ate the roots of the World Tree, Yggdrasil and swore at the eagle living in the tree's branches. Nidhogg also ate corpses.
... 65 years of age or older. The median age is 39 years. For every 100 females there are 104.2 males. For every 100 females age 18 and over, there are 97.8 males.
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