Tony Heald / African elephant calf on knees by water {Loxodonta africana} Kaokoland, Namibia

Pete Oxford / Galapagos Sea Lion (Zalophus wollebaeki) photographed by tourist, Hood Island, Galapagos Islands, Ecuador

Pete Oxford / Galapagos Sea Lion (Zalophus wollebaeki) photographed by tourists, Hood Island, Galapagos Islands, Ecuador

Martin Dohrn / Hagehai warrior sitting by river, Papua New Guinea

Anup Shah / Three Hadzabe bushmen squatting round fire, preparing to cook. Lake Eyasi, Tanzania.

Sharon Heald / Himba woman squatting, Kaokoland, Namibia

Premaphotos / Malabar orb weaver spider (Nephilengys malabarensis) male squatting in the web of a giant female in a cave, Sumatra