Ardipithecus—Hominin or Not?

S1, E3: In 1994, paleontologists discovered the 4.4-million-year-old remains of Ardipithecus ramidus. Is it a true hominin? What skeletal features suggest the tradeoffs between being an effective climber and walking bipedally? Answer these and other questions by closely examining the fossil and genetic evidence of this fascinating “ground ape.”