Robust clay: Chemist from Halle University finds glass needles in thousand-year-old ceramics from Brazil
5000 years ago the Brazilian natives mixed their clay with additional materials for improvement of the resistance and durability of their pottery. An important role played microscopically small glass needles of freshwater tree sponges, which was detected by an international team of researchers led by Dr. Filipe Natalio of the Institute of Chemistry at Halle University. Read more