Why do pigs like to play in mud? -- Trevor J. Thompson, 7, Washington "As happy as a pig in mud" is a phrase some people use to express how much fun someone is having. For instance, at this very ...

Pigs and mud go together like...well, pigs and mud. They're a classic combination. But did you know there's a reason why these animals like to spend their time in the muck? There are actually several, ...

Pigs are one of many animals that wallow in the mud, using the roll in filthy water to keep cool in the absence of sweat glands. And that particular arrangement might be just how ancient pigs liked it ...

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