Input (grade 13): Well-preserved fossils have been found in the 400-million year old Rhynie cherts of Scotland, which look surprisingly modern, indicating that the basic structure of the harvestmen has not changed much since then.
Output (grade 7): Well-preserved fossils have been found in the 400-million year old Rhynie cherts of Scotland. This may indicate that the basic structure of the harvestmen has not changed much since then.