Great question! It would be very difficult to take a human brain and put it in an animal body; we are just too different for the brain to survive. Some scientists are starting to grow other human organs inside of animals; these are called human-animal hybrids, or ‘chimeras’. One thing that they are worried about is if the human cells mix with the brain cells of the animals, we could get a pig or a mouse that is much smarter than a normal pig or mouse. This still probably wouldn’t be a human mind, but we might have to treat this hybrid-pig or hybrid-mouse differently.