 The fossils are arranged by approximate age as determined by radiometric dating and/or incremental dating and the species name represents current consensus; if there is no clear scientific consensus the other possible classifications are indicated.The early fossils shown are not considered direct ancestors to "Homo sapiens" but are closely related to direct ancestors and are therefore important to the study of the lineage.After 1.5 million years ago (extinction of "Paranthropus"), all fossils shown are human (genus "Homo").