Brandon Keim in Wired:
It's a question that's perplexed philosophers for centuries and scientists for decades: where does consciousness come from? We know it exists, at least in ourselves. But how it arises from chemistry and electricity in our brains is an unsolved mystery.
Neuroscientist Christof Koch, chief scientific officer at the Allen Institute for Brain Science, thinks he might know the answer. According to Koch, consciousness arises within any sufficiently complex, information-processing system. All animals, from humans on down to earthworms, are conscious; even the internet could be. That's just the way the universe works.
“The electric charge of an electron doesn't arise out of more elemental properties. It simply has a charge,” says Koch. “Likewise, I argue that we live in a universe of space, time, mass, energy, and consciousness arising out of complex systems.”