In a few short weeks, we’ll get to hear Fossora, the new album from Icelandic hero Björk. Last week, Björk released “Atopos,” the first sing from the LP. Today, she’s followed that one with “Ovule,” a new song that seems to travel in a bunch of different directions at once. Björk produced and arranged “Ovule” herself, and the only other credited musicians are Bergur Thorrison on trombone and Soraya Nayyar on timpani. (Björk arranged the trombones and timpani, too.)