A different take

 

From Anthropocene - A drug kingpin, some escaped hippos—and the surprising benefits of mixing exotic and native animals

Of course, extinct animals are a completely different kettle of fish. Or the potential problems that could arise if they are brought back anyway. 

At least in my mind although I appear to be in the clear minority here.

Bring it! Earth is already upside down, might as well give it one last shake.