New research shows that pigs, already known to be intelligent, may also be able to feel empathy. Scientists in the Netherlands used music to train a group of pigs to anticipate either food or stress, then introduced untrained animals into the mix. The end result: the "naive" pigs did seem to empathize with their trained counterparts, as they anticipated either a positive or negative experience.

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Maybe I've just read Animal Farm too many times but, you know, I could really easily be convinced that pigs are just humans cursed by some ancient god and transformed into animals or something.