5

Logistics sets some applicable limits: Animals require food, produce waste. The larger the animals, the more resources required. In an environment where every gram is expensive, this means animals should be small. Something with a will on it's own moving among critical equipment is hard to plan for. Animals should therefore be confined to their own ...


3

Cats, dogs, mice or rabbit as pets in zero gravity would be a problem, training them to use a zero gravity toilet would be at least very difficult if not impossible. Similar problems with eating and drinking.


2

I can add a little bit more to Hobbes' great answer. ESA cooperates extensively with NASA on a range of projects; the ISS is the biggest, but ESA and NASA are very enmeshed in each other's operations. Almost all of this cooperation is done on a barter basis, where on side provides, say, an instrument, and the other side provides launch, or whatever. The ...


1

I would be fascinated to see how something like a sugar glider or flying squirrel would do in microgravity. Tiny, omnivorous, and can be kept as pets. I wouldn't be surprised if they could eventually figure out how to use their gliding membranes to fly/swim/otherwise move around.


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