Graduation day, S12E4

The final episode of the season occupies a time of transition, as spinoff company Espiku ramps up. We get an update on two systems that received patents and a third that could provide an environmentally benign technology for extracting lithium. We also hear from four graduating students who reflect on their experiences. Bonus content:  Tapping technology to ensure the world has enough clean water  OSU-Cascades spinout is semifinalist in $4 million federal lithium extraction contest