"We need to remember that higher education is about more than teaching students; it's about developing ideas," the former president of Harvard University explains, outlining how science and technology could transform colleges and universities in the years to come. From the Aspen Ideas Festival, Summers also points out flaws in the system -- "in higher education, we take too few risks, and we are overly concerned with maintaining tradition."
Colorado is now well into its first year as the first state to legalize recreational marijuana. How's it going? James Hamblin visits Aspen.