Science magazine reports the discovery of a new Australopithecus species: sediba.Two skeletons in reasonably good condition have been found in South Africa's Malapa Cave. The skeletons are dated from 1.95 to 1.78 million years ago, making them contemporaries with early Homo erectus. Its pelvis and teeth are said to be more like early Homo than its presumptive ancestor, Australopithecus africanus. On this blog I have assumed that the human lineage moved through the Homo genus right from the beginning. That would put sediba on a collateral line, but these taxonomies are all imperfect and we never know what surprises tomorrow will bring.