As an adjacent site , Fontana Ranuccio , was dated to 487,000 + / - 6,000 years , Muttoni et al. suggest that Ceprano is most likely 450,000 years old .
[ 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 .