Feeling blue? Take a hike! It turns out that a walk on the wild side may be an invigorating, healthful antidote to brooding. Just the news I've been waiting for (and suspecting) ever since sitting down at my desk this morning. A walk in the park may soothe the mind and, in the process, change the workings of our brains in ways that improve our mental health, according to an interesting new study ...