The latest Census makes clear that America’s future is less white and more multiracial. Then, how to make sure the non-verbal cues in your emails and texts are saying what you want to say. And, the attempt to solve a historical mystery about a confrontation between Black soldiers and white military police in Louisiana during World War II. Also, on today’s show: caffeine can’t make up for a lack of sleep; attraction depends on more than looks alone; swimming is an effective “fountain of youth” for the brain.