Andy Rouse / Mountain gorilla (Gorilla beringei) silverback in Susa group, Parc National des Volcans, Rwanda

Uri Golman / Volcanic eruption near Eyjafjallajoekull glacier, ash and smoke exploding into the air, Iceland, 24/03/2010. Volcano dormant since 1821.

Uri Golman / Volcanic eruption near Eyjafjallajoekull glacier, Iceland, 24/03/2010. Volcano dormant since 1821.

Uri Golman / Volcanic eruption near Eyjafjallajoekull glacier, Iceland, 24/03/2010. Volcano dormant since 1821.

Doug Perrine / Great white shark jaws open at surface {Carcharodon carcharias} South Africa (Non-ex).

DOC WHITE / Blue whale underwater close-up of head and mouth feeding with pouch inflated, Mexico

Theo Bosboom / Powerful waves rolling in at the Atlantic coast of Iceland near Dyrholey during a powerful winter storm. February 2016

SCOTLAND: The Big Picture / Red deer (Cervus elaphus) stag in upland landscape. Lochcarron, Highlands, Scotland, UK.

Christophe Courteau / Mountain gorilla (Gorilla beringei beringei) blackback, juvenile male demonstrating power. Volcanoes National Park, Rwanda.

Christophe Courteau / Mountain gorilla (Gorilla beringei beringei) blackback, juvenile male demonstrating power. Volcanoes National Park, Rwanda.

Tui De Roy / Blue-footed booby (Sula nebouxii) landing. Punta Vicente Roca, Isabela Island, Galapagos.

David Fleetham / Great white shark (Carcharodon carcharias) breaking surface with mouth open. Guadalupe Island, Mexico.