A gallery of earthy goodness by MRK April 5, 2013 by Rogan Tinsley Leave a comment While there’s a lot to be said for clear diagram s, I’ll take these down and dirty versions any time. You may have seen MRK’s amazing videos, but did you know that you can buy prints of his digital creations? staceythinx Share this:TwitterFacebookEmailLike this:Like Loading... Related Author: Rogan Tinsley Biology, science and maths teacher with a PhD in Neuroscience and passion for education.