When people talk about prehistoric monsters, the first thing that comes to mind is often dinosaurs. But the fact is that before the dinosaurs appeared, the earth had already been ruled by a group of “monsters”. They were huge in size and strange in appearance, and some of their features were even completely beyond our imagination: reptiles with sail-like spines, centipedes larger than cars, and sharks with mouths full of “electric saw teeth”.
This article will take you back in time to the wild era before the birth of dinosaurs, and take stock of the 7 most bizarre-looking and powerful prehistoric beasts . The existence of the last creature may subvert your understanding of the laws of evolution.
7. Dimetrodon: A giant with a solar panel on its back
Don’t be fooled by the name, Geodon is not a dinosaur . It lived in the Permian period about 280 million years ago, tens of millions of years before the appearance of dinosaurs. Geodon can be up to 3 meters long, and its most notable feature is the huge sail-like spine on its back, which looks like a portable “solar panel”.
Scientists speculate that this sail is not a decoration, but an important organ for regulating body temperature. When it is cold in the early morning, it can help the Geodon to quickly warm up and resume hunting; in hot periods, it can accelerate heat dissipation. This “natural temperature control system” gives it an absolute advantage in competition.
As for its diet? With its 15-centimeter-long canine teeth, Geodon had almost no rivals on land at the time and was a well-deserved top predator.
6. Cotylorhynchus – the most bizarrely proportioned herbivorous beast
If you think Geodontosaurus is weird enough, then Osteosaurus may make you doubt whether the designer of life is joking. It is over 6 meters long and weighs up to two tons, but its head is only more than 20 centimeters long, which makes it look like “the body and the head are completely out of sync.”
The Osteosaurus lived in the Permian period about 270 million years ago. It was a staunch vegetarian that ate plants. But don’t think it was weak. Its huge size and thick skin made it almost invulnerable to predators. It can be said that the Osteosaurus was a prehistoric version of a “mobile fortress”.
5. Giant Stick Insect (Arthropleura) – Prehistoric “Land Bug”
If you are afraid of centipedes, be prepared. Living in the Carboniferous period about 300 million years ago, the giant stick insect is the “ultimate boss” in the history of insects on Earth. It can reach a length of 3 meters, weigh more than 500 kilograms, and has 750 legs. It looks like a moving “armored train”.
What’s even more terrifying is that it is not only scary in size, but also highly poisonous. The venom of modern centipedes can cause blindness, and scientists speculate that the toxins of giant stick insects are enough to corrode muscle tissue and even cause fatal damage.
Fortunately, these “ultimate bugs” were only active before the appearance of dinosaurs, otherwise the Earth today might be ruled by them.
Fourth place: Sea Scorpion: an amphibious assassin
About 400 million years ago in the Ordovician period, the oxygen content in the ocean was extremely high, which directly created a group of “out-of-size” creatures, one of which was the prehistoric giant scorpion. Its body length is dozens of times larger than that of modern scorpions, and its claws are strong enough to pierce the hard skin of fish. Even the ancestors of sharks are just its “appetizers”.
What is even more frightening is that prehistoric giant scorpions are not limited to the ocean. They have two sets of respiratory systems, which allow them to swim freely in the water and climb onto land to ambush prey. This ability to cross environments made them invincible at the time, making them true “amphibious overlords.”
3. Meganeura: The flying insect king
Do you think birds have always been the masters of the sky? Wrong. Long before birds appeared, the sky belonged to the Meganeura dragonfly . It lived in the Carboniferous period about 300 million years ago, with a wingspan of up to 75 cm, even larger than some modern birds. If it were enlarged in scale, its visual impact would be no less than a small drone hovering in front of you.
The oxygen content in the atmosphere at that time was more than 35% higher than it is now, which allowed insects to break through the size limit. With its excellent flying ability, the giant dragonfly had almost no natural enemies, and its prey range covered both aquatic and terrestrial organisms, making it a veritable “ruler of the sky” at that time.
2. Dunkleosteus: The “Armored Tank” of the Ocean
In the Devonian period 360 million years ago, sharks did not dominate the oceans, but Dunkleosteus , which could reach 10 meters in length and weigh more than 4 tons. Its body was covered with thick bone plates, like a “prehistoric tank” covered in steel armor.
The most shocking thing is its bite force. Scientists estimate that the bite force of the Dunkleosteus was as high as 5.4 tons per square centimeter, which is three times that of the modern great white shark! Almost no prey could survive in front of it, even if it was its own kind, the Dunkleosteus was ruthless. This extreme predatory behavior may be one of the reasons for its extinction.
1. Helicoprion – an ancient killer with a chainsaw in its mouth
If you think the teeth of a great white shark are scary enough, then the Helicoprion will refresh your cognition. It is an ancient relative of modern sharks and can reach 15 meters in length, but the most bizarre thing is its jaw: with spiral teeth arranged in a row, it looks like a chainsaw embedded in its mouth.
Each tooth can be up to 90 cm long and keeps growing and never falls off. The function of this “spiral tooth” is still a scientific mystery. Some speculate that they are used to cut prey, while others believe that it is a defensive structure. In any case, this design is completely like a monster in a science fiction movie, but it really existed.
Unfortunately, the fossils of Helicoprion are extremely rare, and humans have only discovered about 150 tooth samples so far, making it one of the most mysterious creatures in prehistoric times.
Why were these prehistoric creatures so huge?
The answer may be unexpected to you – atmospheric composition, climate conditions and evolutionary pressure. During the Carboniferous period, the oxygen content in the atmosphere was twice as high as it is now, which allowed insects to “upgrade infinitely”; and the nutrient-rich environment in the Devonian ocean gave birth to the armored monster Dunkleosteus.
Their existence is not only a miracle of evolution, but also a reminder that the rules of nature will be completely rewritten over time. If the environment changes drastically again in the future, will the Earth give birth to another “giant overlord”?
If you could travel back to that era, would you dare to face these behemoths? Please leave your answer in the comment section!