Spotted Hyena or Spotted Hyaena (Crocuta crocuta) with a Cape Buffalo skull, Ngorongoro Crater, Tanzania

Adult bull southern elephant seal (Mirounga leonina), skull on display at the Natural History Museum in Stanley, Falklands, South America

Wadi al Hitan, Faiyum, Egypt. February 20, 2022. Fossil whale skull in the museum at Wadi el-Hitan paleontological site.

Wadi al Hitan, Faiyum, Egypt. February 20, 2022. Fossil skull of a paleomastodon elephant in the museum at Wadi el-Hitan paleontological site.

Wadi al Hitan, Faiyum, Egypt. February 20, 2022. Whale fossil in the museum at Wadi el-Hitan paleontological site.

Wadi al Hitan, Faiyum, Egypt. February 20, 2022. Whale skull fossil in the museum at Wadi el-Hitan paleontological site.

Wadi al Hitan, Faiyum, Egypt. February 20, 2022. Fossil whale skull in the museum at Wadi el-Hitan paleontological site.

National Geographic Photographer Ralph Lee Hopkins with a walrus skull (Odobenus rosmarus rosmarus) on the tundra off Freemansundet, Svalbard Archipelago, Barents Sea, Norway

Walrus skull (Odobenus rosmarus rosmarus) on the tundra off Freemansundet in the Svalbard Archipelago in the Barents Sea, Norway

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

Weddell seal (Leptonychotes weddellii) skull (note the cusped teeth) on the beach near the Antarctic Peninsula. Weddell seals used to be hunted as food for dog sled teams.

Long-beaked Common Dolphin (Delphinus capensis) skull found on the beach at Isla Magdalena, Baja, California Sur. Pacific Ocean. Possible by-catch in purse-seiner?

Walrus skull (Odobenus rosmarus rosmarus) on the tundra off Freemansundet in the Svalbard Archipelago in the Barents Sea, Norway

Long-beaked Common Dolphin (Delphinus capensis) skull found on the beach at Isla Magdalena, Baja, California Sur. Pacific Ocean. Possible by-catch in purse-seiner?

Baleen whale skull showing baleen plates, Nouamghar, Mauritania (RR)

Walrus skull (Odobenus rosmarus rosmarus) on the tundra off Freemansundet in the Svalbard Archipelago in the Barents Sea, Norway

National Geographic Photographer Ralph Lee Hopkins with a walrus skull (Odobenus rosmarus rosmarus) on the tundra off Freemansundet, Svalbard Archipelago, Barents Sea, Norway

Skull - art

Marco Polo sheep (Ovis ammon polii) male skull, Issyk-Kul Region, Kyrgyzstan