Jaws of death: Paleontologist renames giant, prehistoric marine lizard

Some 92 to 66 million years ago, as the age of dinosaurs waned, giant marine lizards called mosasaurs roamed an ocean that covered North America from Utah to Missouri and Texas to the Yukon. The air-breathing predators were streamlined swimmers that devoured almost everything in their path, including fish, turtles, clams and even smaller mosasaurs.