In this episode of Going Deep, our hosts go back to an issue they've spent much of their recent years discussing - concussions in contact sports. They catch up with two engineers - Eric Nauman and Tom Talavadge - whom they first met while John was coaching at Purdue University. They've talked with Eric and Tom before about their work on microconcussions, and they get the latest on what the pair have discovered in their research, and how it can be applied to sports like football.