This week on Spark, a special look at the mobile phone: no other technology has so dramatically changed the way people all over the world interact with each other. And it's all happened so fast-a lot of it within the lifetime of Spark as a show. We are looking back through 12 years of the cellphone as covered by Spark, from how phones affect our children and the way we parent, to the ever-present peril of notifications, to how to manage what has become, for many, a crippling addiction.