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Top 28 Giant Prehistoric Animals

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You should consider yourself lucky that these giant prehistoric animals are now extinct else there would have been no human civilization. Here are largest, scariest prehistoric animals ranging from prehistoric sea animals, prehistoric mammals and prehistoric birds.

If you are an active thinker then this list is going to raise a lot of questions. Before you jump on to the list we give you a common fact that our ancestors Homo Habilis (aka The first Human) walked the earth around 2.3 million years ago. Now you can compare the time line of prehistoric animals and human.

Most religions claims that God created all animals and human being. But science suggests that Human evolved on earth some 2.3 million years ago while Dinosaurs ruled the earth for more than 100 million years. So what god did during this time period? Why it took 100 million years for god to create intelligent life? A Second thought that comes to mind is that may be (and just may be) Human Being invaded this planet millions of years ago and wiped out all the dinosaurs to become the alpha animal of this planet. Phew, Too Much stuff. Anyways, Here are the 28 scariest giant Prehistoric animals:

Giant Prehistoric Animals

28. Opabinia
Prehistoric Animals
If you thought platypus was funny then you haven’t probably heard about Opabnia. Opabnia has a very weird body structure. It existed 518 million years ago making it one of the oldest known animals.
27. Jaekelopterus
Prehistoric Animals
If Jaekelopterus existed in modern era then Kids would have$#it their pants. These strange prehistoric animals were 2.5 metre in length and existed 390 million years ago.
26. Josephoartigasia
Prehistoric Animals
Josephoartigasia were the largest rodents to ever roam on this earth. These prehistoric animals were as big as cows and looked scary.
25. Megalania aka The Giant Ripper Lizard
Prehistoric Animals
These extant ancestors of Komodo Dragons were measured to be 7 metres from head to tail and were believed to be poisonous. They mainly resided in Australia and only went extinct around 50 thousand years ago.
24. The Steppe Mammoth
Prehistoric Animals
Ice Age film series has forced us to develop affection for Mammoths. These woolly creatures were a bit larger than African elephants. They can grow up to 4.5 metres and were full of fur. They lived around 3.7 million years ago around Eurasia.
23. Basilosaurus
Prehistoric Animals
Whales are humongous sea creatures and Basilosaurus was king of whales. It lived 40 million years ago. Growing upto 20 metres their name translated to King Lizard.
22. Megatherium
Prehistoric Animals
The Idea of Giant Sloth can scare anyone. Megatherium were giant sloths who were as big as modern African Elephants.
21. Gigantopithecus
Prehistoric Animals
Hold on your Yeti and Big foot theories, Gigantopithecus went extant 30 thousand years ago. Their rough height is estimated to be 3 metres and weight up to 600 KG.
20. Terror Bird
Prehistoric Animals
Phorusrhacids got their name terror birds when it was found that they were the largest known carnivorous animals in the prehistoric America. Terror birds were 3 metres tall and they used to prey with their pointed beak. Even though they were flightless but they were capable of hunting down a running cheetah. They lived around 1.2 million years ago so it is possible that our human ancestors had duels with them.
19. Deinosuchus
Prehistoric Animals
Deinosuchus brings out the worst nightmares to reality. This humongous crocodile usually preyed upon large dinosaurs and probably was the most feared predator of its time. They lived 80 million years ago and grew up to 12 metres.
18. Dunkleosteus aka Armoured Fish
Prehistoric Animals
This species of armoured fish roamed in the world ocean some 360 million years ago. It is estimated to be 6 metre in length and had one of the strongest bites in recorded history. They were known to attack and eat anything that comes their way. This included their own species too.
17. Liopleurodon
Prehistoric Animals
Liopleurodon could easily top the list of scariest prehistoric animals. It was 7 metre in length but most scary part of it was the elongated skull. It had very strong teeth and it was apex predator existing 160 million years ago.
16. Elasmosaurus
Prehistoric Animals
These creatures were among the giant prehistoric animals. They existed around 81 million years ago. They had length of 14 metre and a very long neck. They weighed 2000 kg.
15. Smilodon
Prehistoric Animals
It is more popularly called as the Saber-tooth tiger and it existed 2.5 million years ago. It extant around 11thousand years ago this means that this pre historic animal existed with mankind.
14. Spinosaurus
Prehistoric Animals
Spinosaurus were the largest known carnivorous dinosaurs ever existed. These dinosaurs were so huge that even the hump on their back was bigger than a grown man. They are estimated to grow up to the height of 18 metres and were apex predators.
13. Giganotosaurus
Prehistoric Animals
Dinosaur lovers will cheer for this as these are among the favourite dinosaur species on the planet. These were extra-large species of dinosaur increasing up to 13 metre in height. They were like the bigger brother of T-Rex.
12. Livyatan melvillei
Prehistoric Animals
If whales were a usual sighting as apes then people would surely have made claims of seeing Livyatan Melvillei. This whale species went extant around 5 million years ago. It is believed to be larger than sperm whale in size.
11. Deinocheirus
Prehistoric Animals
Deinocheirus are described by artists as large kangaroos with Ostrich head. Due to less fossil information about them they are yet to be given a clear physical shape. However the few fossils ofDeinocheirus cleared that they had the longest hands in the dinosaur world and they could grow as big as 12 metres. They existed around 70 million years ago.
10. Tanystropheus
Prehistoric Animals
Their name means long neck. They actually had a very long neck that took half of its body length. It was 20 foot long and its neck was 10 foot long. It existed 232 million years ago.
9. Therizinosauridae
Prehistoric Animals
Theizinosauridae had a very long neck and they roamed 100 million years ago. They were either herbivorous or omnivorous. They had a very strong claw and they were as tall as 10 metre.
8. Thalassomedon
Prehistoric Animals
Thalassomedon translates to the Sea Lord in Greek language. They had the longest neck (growing up to 5.9 metre) compared to any other animal.
7. Helicoprion
Prehistoric Animals
Around 290 million years ago there existed a beast in the ocean that could kill its prey just by a stare. Helicoprion has teeth in the style of spiral saw and there are two theories about how it used. It either gulped down its prey in one go as its mouth shape helped him to eat prey larger than its size. Or its spiral shaped jaw was movable and it might use it to penetrate preys that are relatively far and then eat them. It could grow up to 8 metres in length.
6. Quetzalcoatlus
Prehistoric Animals
Quetzalcoatlus was like the delivering stark of dinosaurs. He was the largest flying animal in the recorded history and existed 68 million years ago. It has wing span of approx. 21 metres.
5. Sarcosuchus Imperator
Prehistoric Animals
Seawater crocodiles are among the most dangerous animals in the world and its ancestor Sarcosuchus Imperator was twice its size. It is called as the largest crocodilian species ever known. It lived 112 million years ago. It can grow up to 40 feet or 12 metres.
4. Megalodon
Prehistoric Animals
An animal does not get the title mega without any special quality. Megalodon has more than one special quality to be called by this name. This ancestor of great white shark is believed to grow up to 18 metres and lived around 24 million years ago. Megalodon translates to Big tooth and it is believed that this prehistoric sea monster wiped out entire species of fishes.
3. Titanoboa Cerrejonensis
Prehistoric Animals
This prehistoric animal is surely going to give you nightmares. People fears Anacondas and Pythons because they are capable of eating a human being alive. But can you imagine that 58 million years ago there lived a snake which was capable of eating a dinosaur. Yes, Titan boa that grows up to 13 metre and weighed 1.15 tonnes is believed to have devoured on dinosaur flesh.
2. Amphicoelias
Prehistoric Animals
Have you ever wondered about what was the largest dinosaur species? The answer is Amphicoelias. This dinosaur species could reach up to 12 metres in height and weight 111 TONNES. Just hold on your breath and imagine that. Luckily Amphicoelias were not meat eaters. Around 150 million years ago they roamed the earth eating early plants and roots.
1. Shastasaurus
Prehistoric Animals
One does not simply earn the title of the largest sea reptile ever found yet. You have to be large, in fact HUGE, to earn this title. They lived around 250 million years ago. Their size was can grow up to 21 metres. They are among the largest prehistoric sea creatures.

Did we missed an strange or scary prehistoric animal? Share your view.