Australopithecus.
<P>
<lI> Lucy,  a  3.24-million-year-old  skeleton,  represents the hominin
species Australopithecus afarensis.
<lI> The  Laetoli  (Tanzania)  footprints,  more than 3.5 million years
old, showed that early hominin could walk upright.
<lI> An artist's reconstruction of what A. afarensis looked like.