The Asian longhorned beetle has been eating trees in the United States. The Central American feverfew weed threatens animal migration on the African Serengeti. Cane toads are invading Australia.
It's not just goods and people moving around the planet at warp speeds — species too are abandoning their native continents and taking up residence around the world.
Some scientists fear disaster, while others think it's great for biological diversity.
But it's probably not good news for Argentine and Uruguayan fishermen that an Asian mollusk has arrived on their shores.
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