Lars Gotrich

The Schneider family is full of nerds. If you were wondering whatever happened to The Apples In Stereo, well — its frontman Robert Schneider has spent the last five years getting his Ph.D in mathematics. No, really, he teaches and studies math at Emory University.

The penumbra is the shadow beyond the shadow, its light only partially blocked by an object. Think of an eclipse, but only being able to experience the edge of it. Tsembla's "Penumbra" achieves a similar effect, its sound sources familiar, but obscured by some very chill electronic rhythms.

Björk doesn't so much perform on a stage — she inhabits a space.