With the advent of globalization, people sometimes forget that it is often best for animal and plant species to remain in their original habitats.
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Turns out that rough-skinned newts have toxins in their skin to which the bullfrogs have no natural defense against.
Ecologists have begun to do their field studies closer to home. In the process, they have discovered that nature survives, and even thrives, in the city limits.
There have been well-known cases of exotic species that should never have been introduced in the U.S. Whether they are the zebra mussels, the snakehead fish, or the Gambian rats that caused the 2003 monkeypox outbreak.
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