Welcome to Prehistoric World
Discover the fascinating creatures that once roamed our planet
Featured Creatures
Featured Creatures
Spinosaurus maroccanus
Cretaceous
Not much is known about this type of Spinosaurus or whether if it actually existed
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Sigilmassasaurus brevicollis
Cretaceous
Sigilmassasaurus was a large theropod dinosaur that lived around 167 million years ago during the Middle Jurassic period in what ...
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Morganucodon watsoni
Jurassic
The Morganucodon is an early mammal-like creature that lived during the Late Triassic to Early Jurassic period, approximately 205–195 million ...
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Updated: February 14, 2025 at 6:47 PM
Dimetrodon limbatus
Period: Permian
Dimetrodon, an extinct genus of non-mammalian synapsids belonging to the family Sphenacodontidae, lived during the Cisuralian age of the Early ...
Did You Know?
Birds Are Living Dinosaurs
Modern birds are actually living theropod dinosaurs, having evolved from a group of dinosaurs called maniraptors.
Earth's Oxygen Revolution
About 2.4 billion years ago, the "Great Oxidation Event" dramatically increased Earth's oxygen levels, making complex life possible.
Hangenberg event
The Hangenberg event, about 359 million years ago, was a mass extinction at the Devonian-Carboniferous boundary, caused by global cooling and anoxic oceans, wiping out many marine species.
The Great Dying
The Permian-Triassic extinction event, known as "The Great Dying," wiped out about 95% of marine species and 70% of land species.
Snowball Earth
Around 700 million years ago, Earth was almost completely covered in ice during the "Snowball Earth" period, with temperatures as low as -50°C.
Ordovician-Silurian extinction
The Ordovician-Silurian extinction, around 445 million years ago, was caused by a rapid ice age and fluctuating sea levels, eliminating nearly 85% of marine species.
Prehistoric Super-Sized Insects
During the Carboniferous period, insects grew to enormous sizes due to higher oxygen levels. Dragonflies had wingspans up to 65 cm!
Walking Whales
Early whales like Ambulocetus had legs and could walk on land, showing the remarkable transition of mammals back to marine life.
The K-Pg extinction
The K-Pg extinction, caused by an asteroid impact 66 million years ago, wiped out 75% of species, including non-avian dinosaurs, due to climate shifts, wildfires, and tsunamis.
Not All Dinosaurs Were Giants
While many famous dinosaurs were enormous, the smallest known dinosaur was the Compsognathus, only about the size of a chicken!