New study puts a definitive age on Saturn's rings: They're really young

High Stakes: Troubling Link Between Cannabis Use Disorder and Schizophrenia in Young Men

Study suggests the reason we worry is to avoid negative emotional contrasts after negative events. In other words, if we are already worried and anxious, we will experience less of a negative emotional contrast after something bad happens than if we were feeling happy and relaxed initially.

Saturn’s Rings Are So Young We’re Lucky To See Them, Say Scientists