Editor's Note Astronomy Don’t worry, be grumpy and take nature’s cycles in stride By Eva Emerson September 23, 2013 at 8:44 am - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print Next time you’re in a bad mood, don’t fight it. Put it to work, and thank evolution for giving you such a flexible cognitive toolbox. That’s one of the take-home messages in behavioral sciences writer Bruce Bower’s article about the unexpected benefits of negative moods.