Pictures Philadelphia Science Festival 2014 On Talk Philly May 1, 2014 / 10:53 AM EDT / CBS News (Credit: Randall E. Scott) Philadelphia Science Festival (Credit: Randall E. Scott) Philadelphia Science Festival (Credit: Randall E. Scott) Philadelphia Science Festival (Credit: Randall E. Scott) Philadelphia Science Festival (Credit: Randall E. Scott) Philadelphia Science Festival (Credit: Randall E. Scott) Philadelphia Science Festival (Credit: Randall E. Scott) Philadelphia Science Festival (Credit: Randall E. Scott)
