Because they evolved longer forelimbs than their early ancestors had had, these upright-walking animals needed to also develop means to help keep their centers of balance stable over their hips.

(AP Video: Laura Bargfeld, Mary Conlon) Members of the Get Healthy Walking Club walk the paths past the animal enclosures during the morning at the Louisville Zoo in Louisville, Ky., Friday, Oct. 18, ...

My brief taste of animal flow left me wanting more and feeling that some of that youthful looseness could be regained. This is walking out from your feet with your hands, keeping your bottom high ...