September 24, 2011 was the 2nd TEDxBoulder switching to a larger venue at the historic Macky Concert Hall. It sold out with 2200 in attendance.  

Phil Plait

Mollie O'Brien & Rich Moore

Joshua Scott Onysko

Glorianna & Mercina Tillemann-Dick

Kristen Wheeler

Robyn O'Brien

Jake Nickell

Joel Gratz

Daniel Epstein

Leslie Dodson