Happy Saturday! This week, researchers reported on the familiar phenomenon of speeding away from a slower-driving car only to have it catch up at the next traffic light—they've named it Voorhees law, after the well-known movie slasher who always catches up to his victims. A study finds that nonpsy chotropic cannabinoid CBD reverses brain damage in a mouse model of Alzheimer's disease. And scientists are testing methods to regrow joints damaged by arthritis. ...read more read less