The Smartest Animals In The World

Pigs

They might not seem it, but research has shown that pigs are among the smartest, cleanest domestic animals out there. The mud they roll around in might make you think otherwise, but they actually do this to cool off as they do not have sweat glands.

Pigs have excellent long-term memories and love to interact with others and do not do well by themselves, making them similar to humans. They have also been known to use mirrors in order to find food.