text: An adjacent site , Fontana Ranuccio , was dated to 487,000 + \/ - 6000 years and Muttoni et al . suggest that Ceprano is most likely 450,000 years old .
simplified: ( 3 ) An adjacent site , Fontana Ranuccio , was dated to 487,000 + \/ - 6000 years and Muttoni et al . suggest that Ceprano is most likely 450,000 years old .