Last physicist into the consciousness pool is a rotten egg!

From livescience.com:

Roger Penrose, a mathematical physicist at Oxford University, believes that if a "theory of everything" is ever developed in physics to explain all the known phenomena in the universe, it should at least partially account for consciousness.

Penrose also believes that quantum mechanics, the rules governing the physical world at the subatomic level, might play an important role in consciousness.

Then again, quantum mechanics is the default answer for everything these days...