When kids were kids in most rural towns, there was gravel on the playgrounds, goat head stickers in the outfields of ball fields. And then if you were lucky? There was a tetherball set up beckoning ...

For a female muskox at the Port Defiance Zoo in Tacoma, Washington, a morning’s exercise can take many of forms. She can trot around her enclosure, hang out with her calf, or get a little game of ...