Bagnold Dunes (original) (raw)

The Bagnold Dunes is a 35-kilometre-long (22 mi) group of dark grey dunes in the Gale Crater on Mars. They are named after Ralph Alger Bagnold, who crossed the Libyan Desert and was one of the first explorers to acquire a deep understanding of the physics behind sand dunes. The dunes migrate around 0.4 metres (1.3 ft) every Earth year.