I think there's some really interesting historical discoveries to be made, piecing together artefacts from ancient lost civilisations and understanding their purpose. It's not entirely new knowledge, but LIDAR and such shows us amazing secrets in innocuous places.<br>Also, graphene being the subject to many complicated experiments and theories as to its possibility, only to be made by putting sticky tape on the end of a pencil. A preschool kid can make this wonder material!