Actually forgot about this one until Leo Tulipan and Julia Tulipan released it on their excellent Paleo-centric Evolution Radio Show http://evolutionradioshow.com/english/ (German version at http://evolutionradioshow.com/ )
Yes - they're German - and serious about this stuff too ! We however had great fun at the Health Unplugged Paleo Conference in London last November. Link to the guys via facebook at https://www.facebook.com/PaleoLC/?fref=nf .
And now the interview - what was the topic in question? Why, Insulin, diabetes, blood sugar and....engineering of course :-)
For reference, Dr. Kraft's seminal and extraordinary work on insulin/diabetes can be seen here: http://www.thefatemperor.com/blog/2015/9/5/fat-emperor-productions-present-the-kraft-interview-decoding-diabetes
Don't forget to subscribe (free!) : www.thefatemperor.com/subscribe