How does our subjective reality emerge from the physical structures of the brain and body? iStockphoto.com hide caption toggle caption iStockphoto.com Opinion 13.7: Cosmos And Culture The Nature Of Consciousness: A Question Without An Answer? August 7, 2013 We don't know how the brain creates consciousness, the subjective you. So, can machines do it, too? Commentator Marcelo Gleiser confronts "the hard problem of consciousness" and finds a world in which what we can know may have its limits.