The United States celebrates National Pig Day to honor one of nature's smartest animals
National Pig Day celebrates the remarkable intelligence of pigs, which researchers have found possess cognitive abilities comparable to young children and can even learn to play basic video games.
Established in 1972 by sisters Ellen Stanley and Mary Lynne Rave, National Pig Day honors one of the animal kingdom's most misunderstood creatures. Far from being just farm animals, pigs are highly social and rank among the top ten most intelligent species on Earth.
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