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D. Hałas: Brachiosaurus altithorax 1
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D. Hałas: Field Museum of Natural History
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D. Hałas: Founded by Marshall Field 1893
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D. Hałas: Stanley Field Hall
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D. Hałas: Totem Poles
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D. Hałas: African Elephants
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D. Hałas: Tyrannosaurus rex 1
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D. Hałas: Tyrannosaurus rex 2
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D. Hałas: Tyrannosaurus rex 3
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D. Hałas: Tyrannosaurus rex 4
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D. Hałas: Tyrannosaurus rex 5
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D. Hałas: Statue in Stanley Field Hall 1
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D. Hałas: Statue in Stanley Field Hall 2
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D. Hałas: Trilobites
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D. Hałas: Protaspis transversa
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D. Hałas: Gonatodus brainerdi
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D. Hałas: Helicoprion ferrieri
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D. Hałas: Palaeozoic Forest
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D. Hałas: Tullimonstrum gregarium
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D. Hałas: Eryops megacephalus and Acheloma cumminsi
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D. Hałas: Labidosaurus hamatus
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D. Hałas: Edaphosaurus pogonias
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D. Hałas: Dimetrodon grandis and Sphenacodon ferox
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D. Hałas: Jonkeria sp. and Aulacephalodon peavoti
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D. Hałas: Angistorhinus grandis
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D. Hałas: Herrerasaurus ischigualastensis
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D. Hałas: Stegosaurus stenops
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D. Hałas: Cladogram
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D. Hałas: Adler Planetarium
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D. Hałas: Shedd Aquarium