These 10-20 minute videos are worth your time.
“TED was born in 1984 out of the observation by Richard Saul Wurman of a powerful convergence between Technology, Entertainment and Design.The first TED included the public unveiling of the Macintosh computerand the Sony compact disc, while mathematician Benoit Mandelbrot demonstrated how to map coastlines with his newly discovered fractalsand AI guru Marvin Minsky outlined his powerful new model of the mind.Several influential members of the burgeoning ‘digerati’ community were also there, including Nicholas Negroponte and Stewart Brand.” - From TED.com
There’s a wide range of subjects, and they are all great. Start with Hans Rosling at the bottom of the page and you’ll be hooked.
:: TED Talks
