Petra Wegner / Young woman stroking Cavalier King Charles Spaniel, tricolour

Gerry Ellis / Camelthorn (Alhagi maurorum) in sand dune of dead veil near Sossusvlei, Namib-Naukluft National Park, Namibia

Gerry Ellis / Camelthorn (Alhagi maurorum) snag on desert pan, Namib-Naukluft National Park, Namibia

Gerry Ellis / Camelthorn (Alhagi maurorum) trees and calcite between dunes at Dead Veil, Namib-Naukluft National Park, Namibia

Ingo Arndt / Camelthorn (Alhagi maurorum) trees and calcite at Dead Veil, Namib-Naukluft National Park, Namib Desert, Namibia