The air now filling your lungs is shared with everyone in the same room as you; with everyone who has ever been in the room you are in; and with everyone who has ever walked this planet. Breathing isn’t just a biological process; it enables us to communicate, to speak, to create music. It can have deep cultural and spiritual meaning. It can be a marker of both health and illness. Though it is essential to life most of us happily take easy breathing for granted. It tends to be