R&D Mailbag: Getting to the bottom of Rainier Light, your reaction to Gun Free businesses, and having "The Talk" with your kids about sex. Talk Shots: San Diego Mayor Filner headed back to work. New York parking meter inspector manages to steal 840,000 coins. Ring My Belle: Seattle Police Department hands out Doritos at Hempfest, now they're up on Ebay. Disclosing everyone's salary at work: Would that help or hurt morale? Father writes blog about why he hopes his daughter has good sex. The science behind near-death experiences.