 Past exhibits have included a fossil sand dollar which was found by Charles Darwin in 1834, Captain Cook's mamo, and two pheasants that once belonged to George Washington, now on loan to Mount Vernon in Virginia.The Harvard Museum of Natural History is physically connected to the Peabody Museum of Archaeology and Ethnology; for visitors, one admission ticket grants access to both museums.The research collections of the Museum of Comparative Zoology are not open to the public.