Who are the best young talents on the baize? (Picture: Getty Images) Snooker’s top stars are lasting longer than ever, with some of the best in the world now in their 50s and still competing for titles. The legendary trio of Ronnie O’Sullivan, Mark Williams and John Higgins have all passed the half-century and all remain in the top 16 in the world rankings. Then come the 40-somethings who are also as good as ever: Mark Selby, Neil Robertson, Sha…