There are literally thousands of talks on the website, so I've decided to share some of my own personal favorites with this forum. For my opening post, I've gone with one of my all-time favorites by Hans Rosling, a professor in global health. I love this for several reasons: He asks us to re-assess our understanding and use of the word "Third-world" when we think about countries around the world, he does an incredible job of demonstrating what good data analysis can do, he walks us through a wonderful online tool at www.gapminder.org, and he makes it all so much fun.
I hope you enjoy!