Macmillan Learning There are many examples of species that were ancestral to or closely related to the ancestors of modern humans, Homo sapiens sapiens. The figure shows when several key human ancestors were alive. Label the figure with the names of the human ancestral species. Millions of years ago 0.5 1.0 1.5 cic 2.0 2.5 3.0 3.5 4.0 4.5 Ardipithecus ramidus Australopithecus boisei Australopithecus africanus 11:0/ Homo sapiens sapiens

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Paleontology

A branch of science concerning the scientific study of life from ancient times is known as paleontology. The scientists working on paleontology are known as paleontologists. Paleontologists collect the fossils of organisms from ancient times to classify them. The paleontologists also study the environment from ancient times to study the interactions between different organisms.