The 'Primitive' sense of smell and the brain

American neuroscientist Richard Axel discusses the problem of interpreting the real world within the tangled web of neurons within the brain, focusing on one of the brain's most "primitive" senses, the sense of smell. Axel's work on the olfactory system won him and Linda B. Buck, a former post-doctoral scientist in his research group, the Nobel Prize in Physiology or Medicine in 2004.