We continue our examination of the business book "The Rise of the Creative Class," which helped people understand the identity of their cities, with an interview of author Richard Florida. How did the book come about and where is the creative class congregating today?

I spent a few days in March in Ann Arbor Michigan as a guest of Professor Thomas Zurbuchen, Associate Dean for Entrepreneurial Programs, and Doug Neal, Director of Center for Entrepreneurship in the Engineering School at the University of Michigan.

NASA recently leveled with the Obama administration: without a lot more funding, we're not going back to the moon. It's straight to Mars for the United States, and that's not going to be a cheap trip either. With that news in mind, the more than 300 attendees to the 31st biannual International Electric Propulsion Conference will put their heads together on the future of electric propulsion technologies. Electric propulsion, though packing a high specific impulse, is constrained by limits on the amount of electrical power we can feasibly carry into space. Read More »