A 2005 potassium-argon dating of volcanic tuff associated with the Omo remains showed them to date from about 195,000 years ago , making them older than the `` idaltu '' fossils and the earliest known remains of anatomically modern humans .
A 2005 potassium-argon dating of volcanic tuff associated with the remains showed them to date from about 195,000 years ago , even older than the `` idaltu '' fossils . These Omo remains are the earliest known remains of anatomically modern humans .