Education Department's circulating diorama of polar bears, mid-20th century; open case view with cover 

Education Department's circulating diorama of polar bears, mid-20th century; open case view 

Oyster shell given to Museum by Henry Moore with painted plaster sculpture, c. 1975 

Education Department's circulating diorama of polar bears, mid-20th century; closed case view 

Henry Moore painted plaster sculpture, Standing Figure: Shell skirt, c. 1975 

Letter from Henry Fairfield Osborn to Chinese officials, AMNH letterhead, page 2 of 2, Central Asiatic Expedition 

Fossil palm frond (cast) 

Letter from Henry Fairfield Osborn to Chinese officials, AMNH letterhead, page 1 of 2, Central Asiatic Expedition 

American Museum of Natural History Centennial Medal - awarded to Libbie Hyman 

American Museum of Natural History Centennial Medal awarded to Libbie Hyman 

American Museum of Natural History Centennial Medal awarded to Libbie Hyman 

Specimen with examples of Scaumenacia (a lungfish), Eusthenopteron (an extinct relative of tetrapods), Bothriolepis (a placoderm), and Archaeopteris, a fernlike land plant distantly related to modern 

AMNH letters from old Hayden Planetarium signs displayed in Gottesman Library great range. 

Anne and Bernard Spitzer Hall of Human Origins, center with Lucy restoration exhibit 

Professor Henry Fairfield Osborn with fossil tooth near Irdin Manha, Inner Mongolia, China, 1923 

Gottesman Library great range 

Fossil fish Sacabambaspis Janvieri, an ostracoderm from the Late Ordovician of Bolivia (cast), about 450 million years old 

Eonaso deani, surgeonfish, L 29 cm 

Zeiss projector lenses 

Gottesman Research Library great range, west side