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Humans have the widest distribution of any terrestrial mammal species, inhabiting every continent on earth (although there are no permanent settlements on Antarctica). A small group of humans has been introduced to space, where they inhabit the International Space Station.

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Wouldn't mice be everywhere humans are? Dogs too? Except the iss of course.

Are there dogs at the antarctic research stations?

Not anymore, apparently the dogs were attacking the penguins.

I don't remember hearing that James Cameron had any stowaway rats on the Deepsea Challenger, so the bottom of the Marianas Trench is at least one other place humans have been exclusively.

I think the "distribution" is concerned with long-term habitation, which the Deepsea Challenger in the Marianas Trench was not.

To be fair, the ISS is not a long-term habitation either.

there are permanent settlements in Antartica (for some definition of "permanent")

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