John Ryter is my lead partner in Cambridge MA, a gnarly climber, and also a PhD student in materials science at MIT (aka MassTech) where he studies recycling using a unique combination of economic theory and environmental modeling. John's work has entertained me during countless climbing sessions and now it can equally enthrall you, via the magic of the Internet. We were very happy to have John present to the group, particularly since the audience contained a chemist, a physicist, and a geo-physicist, in addition to the standard array of derelict computer scientists (myself included). To read more about John's work, refer here. You can also watch this talk on YouTube, here.