Get ready to squeal: March 1 marks National Pig Day! It all started in 1972, when two sisters — Ellen Stanley of Lubbock, Texas, and Lynne Rave of Beaufort, North Carolina — decided that the United States needed a day to celebrate swine of all kinds for their intelligence. According to Rave, who was quoted in the Virgin Islands Daily News, National Pig Day is "to accord the pig its rightful, though generally unrecognized, place as one of man's most intellectual and domesticated animals."
Rave was onto something. Pigs are a highly intelligent species, ranking up there in the company of dogs, chimpanzees, dolphins, and even humans. Not only that, they're pretty cute — especially if you focus your attention on the adorable piglets in the gallery below. From spotted pigs to messy piglets rolling in the mud and chubby pigs with pink, wet noses, we can't get enough! In honor of National Pig Day, take a look at some of the most delightfully charming pigs around — plus learn 10 facts about these fascinating animals that you never knew you needed to know.