8 terrifying prehistoric creatures that once ruled the Earth

Long before humans walked the planet, Earth belonged to creatures that looked straight out of a sci-fi film. Giants resembling dinosaurs, but with absurdly long necks; giant fish that could even walk on land! These mega-beasts ruled the planet before being swiftly wiped from the face of the Earth.

(Representative image generated using AI)

Long before humans walked the Earth, a giant ruled it – Tyrannosaurus rex. You may know it as T. rex, one of the most fearsome predators in history. This 40-foot-long predator stomped through the forests of North America during the Late Cretaceous Period, about 66 million years ago. This carnivore moved so quickly, at about 12 miles an hour, that its prey had almost zero chance of survival. It had a bite force of about 12,800 pounds per square inch, meaning it could crush bone like chalk.

Imagine a great white shark. Now triple it. That’s Otodus megalodon, the ocean’s ultimate apex predator. These mega-beasts cruised through the warm seas during the Miocene and Pliocene epochs. At up to 60 feet in length, with serrated teeth the size of a human hand, this giant didn’t just eat fish but hunted whales. They went extinct approximately 3.6 million years ago.

They ruled the oceans hundreds of millions of years before the first dinosaur walked the Earth. This bizarre-looking creature, which can be described as an unusual shrimp, is regarded as the world’s first apex predator – the killer whale of its day. It used two large, spiny, claw-like appendages to catch and crush its prey. Speed, agility, and sight were its superpowers.

Guess what? These mighty creatures were larger than T. rex. They are regarded as the largest carnivorous dinosaurs ever found, with most reaching 50 feet. They ruled the lands of North Africa during the Cenomanian stage of the Late Cretaceous Period. They hunted both terrestrial and aquatic prey.

If Tiktaalik were ever to contest an election, chances are it would win by a landslide. After all, it literally bridged two worlds. Tiktaalik wasn’t your typical fish. It could walk on land. Yes, that’s right. This creature lived about 375 million years ago during the Late Devonian Period. It had fish-like features such as gills and scales, alongside a flat head, a mobile neck, and limb-like fins strong enough to prop up its body. It could navigate shallow waters and even haul itself onto muddy shores. Tiktaalik is, in fact, the missing link in vertebrate evolution.

Imagine an elephant, but built for the Ice Age. The woolly mammoth (Mammuthus primigenius) roamed frozen tundra alongside early humans. They stood 11 feet tall, with tusks curving up to 15 feet. Can you believe that our ancestors hunted them? They vanished only 4,000 years ago, while the Egyptian pyramids were already standing.

After the dinosaurs died, snakes became rather ambitious. Titanoboa cerrejonensis slithered through Colombian rainforests 60 million years ago. Imagine snakes, but giants measuring up to 48 feet and weighing over a ton. It was certainly not a constrictor you could escape.

For decades, palaeontologists couldn’t agree on what Tanystropheus even was. Was it a dinosaur, or just another reptile? This Triassic reptile lived approximately 242 million years ago in what is now Europe and the Middle East. If you were ever to time-travel, you wouldn’t struggle to identify it. Why? Its neck was absurdly long – more than half of its 20-foot body length. There were two types: one aquatic, which hunted fish, and the other land-dwelling.