Editors’ note: Texas Monthly Presents is a new docuseries airing on Texas PBS stations. Check your local listings or watch full episodes here. The eleventh episode of Texas Monthly Presents explores how innovation can change the course of history. One of the featured stories highlights Patricia Sharpe, Texas Monthly’s food critic for fifty years, reflecting on the inventor of the margarita machine. Additional segments feature frequent contributor Wes Ferguson on a group of hunters working to revive a declining quail population and distinguished writer Mimi Swartz on the doctors who pioneered the first artificial heart.The full episode will be available on Texas PBS stations and streaming beginning Sunday, October 12. Articles in this episode Fifty Years Ago a Texan Changed Happy Hour Forever Can the…