United States July 19, 2019 8:57 am Villanova Students Use Mock Martian Soil So Humans Are Ready Students at Villanova University are trading moon rocks for “Martian” soil to see what it would be like to try and grow crops on Mars. US & World Videos 0:35 Fans of ‘The Office' got to see some of the stars at Fan Expo Philadelphia on Saturday 2:32 Rainy, chilly weather didn't stop many from enjoying festivals throughout Philadelphia 0:29 Driver found safe after carjacking in Delaware 2:23 Teen killed in quadruple shooting in North Philadelphia on Saturday evening 0:39 Teen shot near church in West Philly, two in custody