Juan Carlos Munoz / European cave lion (Panthera leo spelaea) skeleton in Arrikrutz cave, Onati, Gipuzkoa, Basque Country, Spain, March 2015.
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Juan Carlos Munoz / European cave lion (Panthera leo spelaea) skeleton in Arrikrutz cave, Onati, Gipuzkoa, Basque Country, Spain, March 2015.
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Dave Watts / Thylacine (Thylacinus cynocephalus) specimen in Launceston Museum, Tasmania, Australia.
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Dave Watts / Historical photograph of the last Thylacine (Thylacinus cynocephalus) in Hobart Zoo which died in 1936, Tasmania, Australia. Extinct species.
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Dave Watts / Historical photograph of the last Thylacine (Thylacinus cynocephalus) in Hobart Zoo, Tasmania, Australia. Extinct species.
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Dave Watts / Historical photograph of Thylacine (Thylacinus cynocephalus) with mouth open. Extinct species.
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Juergen Freund / Aboriginal rock art of extinct Thylacine (Thylacinus cynocephalus) Kakadu National Park, Northern Territory, Australia. December 2012.
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Roland Seitre / Skull of Steller's sea cow (Hydrodamalis gigas) in the Natural History Museum of Paris. Extinct species.
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John Cancalosi / Fossil trilobite (Kettneraspis sp.) from Devonian period, Morocco.
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David Tipling / Huia (Heteralocha acutirostris) taxidermy specimen. North Island, New Zealand. Extinct species.
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David Tipling / Passenger pigeon (Ectopistes migratorius) taxidermy specimen from North America. Extinct species.