Articles for category: Prehistoric SeaWorld

Mother and Juvenile Plesiosaur

How the Marine Reptile Plesiosaurus Took Over the Seas

Beneath the rippling waters of Earth’s ancient oceans, a remarkable reptilian dynasty once reigned supreme. The Plesiosaurus and its relatives dominated the marine realm for over 135 million years, evolving into some of the most specialized aquatic predators our planet has ever witnessed. With their distinctive body plan—featuring elongated necks, compact bodies, and powerful flipper-like ...

The Hidden Colors of Prehistoric Seas

The Hidden Colors of Prehistoric Seas

Imagine standing on the shores of an ancient Earth billions of years ago, watching waves crash against primordial rocks. The sight would be breathtaking, yet completely alien to our modern eyes. Instead of the familiar deep blue we know today, prehistoric oceans shimmered with unexpected hues that tell a remarkable story of life, chemistry, and ...

Mosasaurs went live—fossils suggest they gave birth to young in the open sea.

What Lurked in the Water During the Age of Dinosaurs?

When we envision the Mesozoic Era—the Age of Dinosaurs spanning from 252 to 66 million years ago—our minds often conjure images of towering sauropods and fearsome predators like Tyrannosaurus rex stalking the prehistoric landscapes. However, equally fascinating and perhaps even more terrifying were the ancient marine ecosystems teeming with predators that would make today’s sharks ...

Archelon ischyros Naturhistorisches Museum Wenen

What Fossils Reveal About the Evolution of Turtles

The enigmatic turtle, with its distinctive shell and ancient lineage, represents one of the most recognizable and unique evolutionary designs in the vertebrate world. For centuries, scientists have been fascinated by these remarkable creatures and their mysterious origins. Fossil discoveries have provided crucial windows into the turtle’s evolutionary journey, revealing a complex and sometimes surprising ...

Kronosaurus hunting on the plesiosaur Woolungasaurus

The Sea Monsters of the Mesozoic: Ichthyosaurs, Pliosaurs & Mosasaurs

The depths of Earth’s primordial oceans once teemed with marine predators so formidable that they would eclipse many of today’s apex ocean hunters. During the Mesozoic Era (252-66 million years ago), while dinosaurs dominated the land, the seas belonged to a spectacular array of reptilian creatures that had returned to aquatic lifestyles. Ichthyosaurs with their ...

Close-up of a large, brown Chinese giant salamander in a clear water tank. Its textured skin and small eyes are visible, conveying a serene presence.

Giant Amphibians and Their Vanishing World

Deep in the world’s remaining old-growth forests, hidden in crystal-clear mountain streams, and lurking beneath the murky waters of ancient lakes, Earth’s giant amphibians have thrived for millions of years. These remarkable creatures—some reaching lengths of over five feet—represent living connections to prehistoric times when amphibians ruled much of the planet. Today, however, these magnificent ...

Sea Creatures

Fossils of Fish Crabs and Sea Creatures Found With Dinosaurs

When we think of prehistoric life, towering dinosaurs often dominate our imagination. However, beneath the ancient waves swam a diverse ecosystem of marine creatures living alongside their terrestrial counterparts. Remarkably, many fossils of fish, crustaceans, and other sea creatures have been discovered in the same geological formations as dinosaur remains. These marine fossils provide a ...

The Inland Seas That Split North America in Two

The Inland Seas That Split North America in Two

The heart of North America once harbored vast prehistoric seas that divided the continent into separate landmasses. These ancient inland waterways, which existed during various geological periods, fundamentally shaped the continent we know today. From the Western Interior Seaway of the Cretaceous period to earlier Paleozoic seas, these massive bodies of water created unique ecosystems, ...

Tullimonstrum

The Fossil That Took 100 Years to Properly Identify

In the dusty corridors of paleontological history lies a remarkable story of scientific perseverance and evolving understanding. The Tully Monster (Tullimonstrum gregarium), discovered in the coal mining pits of Illinois in the 1950s, became one of paleontology’s most perplexing mysteries, confounding scientists for over a century. This bizarre creature’s true identity remained elusive through decades ...