Archaeologists have made a remarkable discovery of the oldest woven grass footwear in Europe, estimated to be up to 6,200 years old, in a bat cave in southern Spain. Radiocarbon dating was used to date the objects, which include baskets, tools and sandals made from esparto grass. The discovery has forced researchers to rethink their assumptions about our human ancestors in the region, and the team is continuing to study the objects to learn more.