JOHANNESBURG, South Africa, July 2 (TNSjou) -- The University of the Witwatersrand issued the following news: * * * Ochre was a crucial tool in early human innovation New research challenge the long-standing assumption that ochre was used solely for symbolic or decorative purposes. * A study by the Centre for Early Sapiens Behaviour (SapienCE) has overturned long-held beliefs about early human technology, revealing that ochre - often regarded as purely symbolic - was in fact used as a sophi  more