The million - year - old fossils are a ` ` snapshot in time , '' he says . They call into question the classification of distinct groups of ancient human relatives . Study authors argue there was one Homo erectus lineage that left Africa for Eurasia . Other authors do n't buy the argument but say skull is important .
1.8 million-year-old fossils are a `` snapshot in time , '' researcher says . Fossils call into question the classification of distinct species of ancient human relatives . Study authors argue there was one Homo erectus lineage that left Africa for Eurasia . Other anthropologists do n't buy the argument but say skull is important .