Sei whale (Balaenoptera borealis) skull, the Neck, Saunders Island, Falkland Islands, South America

Bowhead whale skull (Balaena mysticetus) at the abandoned Kekerten Island whaling station, Nunavut, Canada, North America

Soloman Islands, Skull Island In Roviana Lagoon Used By Local Village To Store Skulls Of Chiefs And Important Enemies

Whale bone on a beach, Baffin island, Nunavut, Canadian Arctic, Canada, North America

Skull from a short-finned pilot whale (Globicephala Macrorhynchus), Urbina Beach, Isabela Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

A warning sign about the presence of Argentinian mines on the Falkands, left over from the 1980's Falklands conflict when Argentina invaded the islands.

Crabeater seal (Lobodon carcinophaga) skull on the beach on Bird Island, Antarctica

Freshly skinned skull of a Polar bear (Ursus maritimus) with huge teeth, Clyde River, Baffin Island, Nunavut, Canada, Arctic

Ossuary, skulls and bones of the explosion victims, Arkadi Monastery, Moni Arkadi, National Monument, Crete, Greece, Europe

Freshly skinned skulls of polar bears, Clyde River, Baffin Island, Nunavut, Canada, Arctic

Martyrs' skulls and bones, ossuary, former windmill, Arkadi Monastery, Moni Arkadi, National Monument, Crete, Greece, Europe

Caribou antlers and skull on Baffin Island, Canada.

Divers are framed by the twin openings at a dive site known as Skull Cave off the Kona coast of the Big Island, Hawaii, United States of America

Turtle shell (carapace) skeleton on the beach at Magdalena Island, Magdalena Bay, West Coast of Baja California, Pacific Ocean, Mexico