So the current journal-article meme floating around is a little study by Peggy Mason at the University of Chicago investigating “the origins of empathetic behavior”. (Link goes to UChicago press release; here’s the NPR article; and here’s the full article as published in Science.)
It’s actually a pretty well-designed study, although, as someone who has actually performed path-following research on rats and as a former pet rat owner, I’ll have to take issue with describing moving off the walls of that “arena” as “scary”. Neither rat in the video seems particularly perturbed. This is likely a consequence of the fact that laboratory rats are not “natural” rats and haven’t been for a very long time — they are in fact a domesticated rat, bred (intentionally or inadvertently) over thousands of generations to deal well with human handling and the laboratory environment.
As thrilled as I am that scientists are even starting to consider the possibility that animals have empathy (or “homolog[s] of empathy”, or whatever animals are allowed to use in order to make their feelings seem less important than ours), much less run actual research to prove such theories to others, it irks me that people feel research even needs to be done on this point. The whole argument for using animals as “models” for humans is that they have similarities to us. If rats have limbs and organ systems and neural constructs similar to ours — as scientists do keep arguing, as otherwise rats would not be such “good animal models” for human disease, behavior, and physiology — why would they not have a feeling mechanism much like ours as well?
My question here: You’ve just proven that rats are social creatures that feel for each other and exhibit both altruistic (opening the cage does not necessarily benefit the free rat, although the argument can be made that freeing the trapped rat reduces the free rat’s own stress) and empathetic (opening the cage seems to involve a recognition that the trapped rat is less than happy) behavior. What behavior will rats have to exhibit before you realize they are living beings with thoughts and feelings, and stop breeding them by the billion for dubious research?
(The short-story writer in me immediately comes up with a premise: someone proves conclusively that rats have feelings and emotions, and someone else says “Hey, now I can experiment on their minds!” and starts running experiments trying to replicate depression and suicide in rats…oh, wait, that’s already being done….)