Until Dendreon hears from the agency, Provenge is a lot like Schrodinger's cat: It's both alive and dead at the same time.

FORBES: Doctor Voices Dendreon Doubts

It was part of a thought experiment intended to illustrate the bizarre nature of the quantum world, in which particles can persist in two states at once and, as a consequence, a cat can be both dead and alive.

ECONOMIST: The 2012 Nobel prizes