Desmatosuchus sp. (specimen 18)

Desmatosuchus horn fragment (Desmatosuchus sp.) from the late Triassic period

Hesperotestudo sp. (specimens 15-16)

Giant tortoise spurs (Hesperotestudo sp.) from the Pleistocene epoch

Alligator mississippiensis (specimen 08)

American alligator tooth (A. mississippiensis) from the Pleistocene epoch

Maiasaura peeblesorum (specimen 07)

Maiasaur bone fragment (M. peeblesorum) from the late Cretaceous period

Plioplatecarpus sp. (specimen 06)

Mosasaur bone fragment (Plioplatecarpus sp.) from the late Cretaceous period

Alligator mississippiensis (specimen 02)

Dermal scute from an American alligator (A. mississippiensis) from the Quaternary period

Testudines sp. (specimen 01)

Turtle scute fragment (Testudines sp.) from the Miocene epoch

KT Boundary Soil Sample (specimen 06)

A vial of layered soil from the KT (KPg) extinction layer in South Dakota, USA

Gastropoda sp. (specimen 27)

An unknown snail species (Gastropoda sp.) in a limestone matrix from the Eocene epoch

Terebra sp. (specimens 24-26)

Auger snail shells (Terebra sp.) from the Pliocene epoch