The postcranial skeleton of Neanderthals was humans when compared to that of anatomically modern O the same size O more robust O more gracile O more arboreally adapted It is likely that Homo sapiens first reached the new world: O via the South Atlantic land bridge O by crossing the Atlantic by watercraft O from Australia O none of the above This material can be directly dated using the potassium-argon method O bone O teeth O volcanic rock and ash O sedimentary rock and ash