An international team has discovered the earliest known hand-held wooden tools used by humans. A study jointly led by Professor Katerina Harvati from the Senckenberg Centre for Human Evolution and Palaeoenvironment at the University of Tübingen and Dr. Annemieke Milks at the University of Reading describes discoveries from the Marathousa 1 site, in Greece's central Peloponnese, dating back 430,000 years.