Complexity (What is it?)

We all have been using the term complexity in many situations. But what really distinguishes Complexity from complicated things? What is emergence? What is a feedback loop?

The BBC4 show “In our time” just tried to do that today by inviting Professor Ian Stewart, Professor Jeffrey Johnson and Professor Eve Mitleton-Kelly to explain in the radio. A great podcast to listen and follow. The MP3 is available for download.