Discovery of 4.4-Million-Year-Old Hominid "Ardi" Is Greatest Scientific…

Venerable journal Science has announced its top breakthroughs of 2009, and topping the list is a breakthrough in evolutionary biology. It's the discovery of Ardipithecus ramidus, a 4.4-million-year-old hominid skeleton that reveals how homo sapiens' ancient ancestors looked and lived. » 12/17/09 2:24pm 12/17/09 2:24pm