Business Insider reports that since the 1980s, wild boar numbers have exploded across the world.<br />In parts of Germany and in Japan, Eurasian wild pigs contaminated with nuclear radiation are running around.<br />Growing numbers prompted the building of a wall between Denmark and Germany to secure Denmark's billion-dollar pork industry.<br />They are carriers of swine flu, and in the US, they're thought to be responsible for more than $1 billion of damage every year.<br />The boars are tough, too.
