Astonished to learn that the Atlantic sturgeon Acipenser oxyrinchus established itself in Northern European streams and along the coasts only 6000 years ago. On an evolutionary time scale, that's NOW, which means that the sturgeon is an invasive species. It was driven regionally extinct in Sweden 100 years ago, yet now they're restoring the population!? Sturgeon = kudzu!
I guess the distinction is that of nature vs. culture.
