They make not look like much, but hops are one of — if not the — key ingredient to making beer, well, beer. These small green plants hold the key to turning yeast and water into that liquid delicacy enjoyed the world over, and different hops give different beers varying, distinctive bitterness and aromas.
But, while they may help create the flavors that make suds so appealing, brewers had a tough time getting their hands on those necessary hops for several years.