Xiphactinus trolled an ancient ocean called the Western Interior Seaway, which covered much of central North America during the Cretaceous. Though long extinct, if alive today the bony fish would ...

In a thrilling revelation for paleontologists and history buffs alike, a new species of early mammal has been discovered in ...

There are some animals emerging from the Late Cretaceous ... when large portions of North America were covered by the Western Interior Seaway, a vast inland sea that split the continent into ...