Omelet, Hamlet, Ivory and Ebony • Earth.com

The subjects of the study were four pigs named Omelet, Hamlet, Ivory and Ebony. A lot rested on their shoulders. As Dr. Candace Croney put it, “This sort of study is important because, as with any sentient beings, how we interact with pigs and what we do to them impacts and matters to them.” Photo Credit: Photo by Scott Olson/Getty Images

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