Wim van den Heever / Ancient dead Camelthorn tree (Vachellia erioloba) trees with red dunes and mist, Namib desert, Deadvlei, Sossusvlei, Namibia. August 2015.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) with red dunes, and star trails, Namib desert, Sossusvlei, Namibia. Composite.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) with red dunes and the milky way behind, Namib desert, Sossusvlei, Namibia. Composite.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) at night with red dunes behind. Namib desert, Sossusvlei, Namibia. Composite.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) with sand dunes, Namib desert, Deadvlei, Sossusvlei, Namibia.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) with sand dunes, Namib desert, Deadvlei, Sossusvlei, Namibia.

Juan Carlos Munoz / Sand dunes with some desert vegetation at base, Namib-Naukluft National Park, Namibia, June 2015.

Inaki Relanzon / Khongor sand dunes, Govi Gurvan Saikhan National Park, Gobi Desert, South Mongolia. June 2015.

Roland Seitre / Dromedary camel (Camelus dromedarius) calf Oriental Great Erg sand dunes, Jbil National Park, Tunisia.

Colin Monteath/ Hedgehog House / Sand dune at sunrise, Simpson Desert, Northern Territory, Australia

Colin Monteath/ Hedgehog House / Spinifex Grass (Spinifex sp) on sand dune with footprints, Simpson Desert, Northern Territory, Australia

Colin Monteath/ Hedgehog House / Parallel sand dunes in desert, Simpson Desert, Northern Territory, Australia