3d rendered depiction of Stem Cells and a human figure. by Kathryn Aragon Last updated on February 11th, 2014 Crazyegg » Blog » Your Brain and Effective Calls To Action: What Works Best and Why » 3d rendered depiction of Stem Cells and a human figure. No Comments DON’T MISS OUTGet updates on new articles, webinars and other opportunities: Keep me informed! Kathryn Aragon Kathryn Aragon is the former editor of The Daily Egg. She's a content strategist, consultant, and author of The Business Blog Handbook. Learn more at KathrynAragon.com. Follow her on Twitter.