PM Roundup: Bus Route Improvements; Mayan Calendar Found

Other stories circulating around the newsroom this afternoon:

-- A $10 million federal stimulus grant will pay for improvements on 15 of Boston's busiest bus routes. [Bay State Banner]

-- A Boston University-led expedition has revealed a Mayan calendar that's four to five centuries older than previously found calendars. [Boston Globe]

-- Boston has been bumped from the No. 2 tech-sector spot by New York City. [Wall Street Journal]

-- A new Senate race poll finds Democrat Elizabeth Warren with a 43-41 lead over Sen. Scott Brown — within the poll's margin of error. [MassINC]

-- Despite a sprained knee, Paul Pierce will play for the Celtics tonight in Game 6. [ESPN Boston]

-- To honor the late Carl Beane, the Red Sox will keep the PA microphone silent for tonight's game at Fenway. [WBZ-TV]