The first beer was brewed around 13,000 years ago - in Israel, not in England. Or maybe by German monks? What makes a good beer? What role does the choice of hop variety and yeast play? How do modern craft beers differ from mass-produced beers? And does the German purity law actually result in “pure beers” - or how many chemicals do they contain? Why are gas chromatography and modern sequencing methods used? There are lots of questions about hops, malt and water. Great Inventions provides the answers.