Fears over invasion of 'super pigs' in USExperts in the US fear a rising number of "super pigs" that are proving tough to eradicate could invade northern states.
Source: Fears over invasion of 'super pigs' in US (https://news.sky.com/story/fears-super-pigs-could-invade-us-states-and-its-not-easy-to-eradicate-them-13015499)