This well-preserved fossil fish skull is from Calamopleurus (Agassiz, 1841), an extinct genus of bony fishes related to the heavily armored ray-finned gars. They are fossil relics, the sole surviving species of the order Amiiformes. Although bowfins are highly evolved, they are often referred to as primitive fishes and living fossils as they retain many of the morphologic characteristics of their ancestors.

Mammoths were herbivore grazers native to Africa, Europe, Asia and North America. They lived out their long lives, 60-80 years, on the mammoth steppe, a periglacial landscape with lush grass vegetation. Mammoths used their well-designed teeth to graze on grasses, leaves, trees, shrubs and moss. Theirs was not a pretty end. Mammoths from this isolated population on Wrangell Island lost the genetic lottery with DNA mutations so abundant that they eventually led to their extinction.

An Eocene Cryptodiran Fossil Turtle, Baena arenosa, reveals the design of the last of his lineage in finds from fine-grained lime mud outcrops in the Green River Formation, Wyoming, USA. The Baena's with their extra long tails marks the last of their lineage as the extinct family Baenidae appeared first in the Jurassic and died out at the end of the Eocene. 

This specimen of the theropod dinosaur Torvosaurus tanneri is on display in Madrid, Spain. The genus Torvosaurus includes a unique species of megalosaurid theropod dinosaur. They are found in the Morrison Formation, western United States but spread widely with specimens of the same species being unearthed in Europe in the Lourinha Formation near Lisbon, Portugal.

A close-up of the dentition of an ancient marine, carnivorous lizard, the mighty Mosasaur, from Late Cretaceous exposures on Vancouver Island. Mosasaurs were air breathers and powerful swimmers. 

They gave birth to live young, similar to sea turtles, seeking out the safety of a sandy shore to lay their eggs. This well-prepped specimen is housed in the collections of the Courtenay Museum, Vancouver Island, British Columbia.