8 ways the world could suddenly end: Stephen Petranek at TEDxMidwest

Unintentional "Dark Futurist", Stephen Petranek, re-visits the subject matter of his original eleven year old TED Talk and offers the audience an extraordinarily sobering look at the eight critical issues that threaten human life on Earth.
In the spirit of ideas worth spreading, TEDx is a program of local, self-organized events that bring people together to share a TED-like experience. At a TEDx event, TEDTalks video and live speakers combine to spark deep discussion and connection in a small group. These local, self-organized events are branded TEDx, where x = independently organized TED event. The TED Conference provides general guidance for the TEDx program, but individual TEDx events are self-organized.* (*Subject to certain rules and regulations)