Some vertebrate and invertebrate fossil casts — including Triceratops horncores and an ammonite — from various sources.
Souvenir postcard (below) from the Field Museum showing Placenticeras placenta, an ammonite from the Cretaceous period.
Some vertebrate and invertebrate fossil casts — including Triceratops horncores and an ammonite — from various sources.
Souvenir postcard (below) from the Field Museum showing Placenticeras placenta, an ammonite from the Cretaceous period.