Breathing - the act of taking air in and out of our bodies - is an activity intrinsically tied to being alive, yet most of us live with little conscious awareness of its existence on a daily basis. The reality of being alive can be defined by the act of breathing itself. Breathing in and out in a steady rhythm signifies that there is life within a body. When one places the finger under the nostrils of a corpse, one is seeking the feel of the breath as the telltale sign of the presence of life. However, despite the vital role of the breath in the phenomenon of life, one can feasibly spend an entire lifetime without ever noticing that one is breathing. In lives lived such, if ever this awareness does arise, it might only be when when one finds oneself gasping for breath, after a hard workout or maybe in the unfortunate situation when one is drowning underwater. In the absence of breath, breath is quickly recognized as the most important necessity for life. The human body is an orch...