ADDIS ABABA (Reuters) - A hominid skull discovered in Ethiopia could fill the gap in the search for the origins of the human race, a scientist said on Friday. The cranium, found near the city of Gawis, 500 km (300 miles) southeast of the capital Addis Ababa, is estimated to be 200,000 to 500,000 years old.The skull appeared "to be intermediate between the earlier Homo erectus and the later Homo sapiens," Sileshi Semaw, an Ethiopian research scientist at the Stone Age Institute at Indiana University, told a news conference in Addis Ababa.It was discovered two months ago in a small...