Today on the Gothamist Newsmap: a missing child at Richmond Terrace and Franklin Ave. on Staten Island, a stabbing on Blake Ave. in Brooklyn, and a patient went missing at Parkway Hospital at 113 St. and 70th Rd. in Queens. Physicist Stephen Hawking is writing an adventure novel aimed at middle-grade readers called "George's Secret Key to the Universe." After-school programs at city schools, which help kids with academic tutoring and offer music and......