Wooden grid pegs mark the edges of a 2 x 2 m excavation unit (foreground) as two Banda Research Project team members screen soil (right) at Station 6. Osei Kofi carries an empty head pan (left). After sieving the soil, the men carefully pick and bag artifacts (fragments of pottery, metals, beads, animal bone) left in the screen. Studying these artifacts and the contexts from which they were recovered (their provenience) helps archaeologists to learn about the daily lives of past people. Makala Kataa, 1989.