A video presents 10 extinct creatures that would make one's "blood run cold". The creatures, in order of appearance, are:
1. Liopleurodon, a giant marine reptile from the Middle Jurassic period, up to 10 meters long.
2. Arthopleura, a large centipede from 315 million years ago, up to 2 meters long.
3. Megalania, a large predatory lizard from Australia, up to 7 meters long.
4. Dunkleosteus, a massive fish from the late Devonian period, up to 6 meters long, with a powerful jaw.
5. Jeholopterus, a giant predatory sea scorpion from the early Devonian period, up to 2.5 meters long.
6. Sarcosuchus, a large crocodile-like reptile from 112 million years ago, up to 12 meters long and weighing 8 tons.
7. Gorgonops, a large predator from 260 million years ago, up to 3 meters long, with huge fangs.
8. Titanoboa, a giant snake from 58-60 million years ago, up to 14.5 meters long and weighing 1,200 kg.
9. Meganeura, a giant dragonfly from the Permian period, with a wingspan of up to 33 cm and a body length of 43 cm.
10. Helicoprion, a shark-like fish from 290 million years ago, with a spiral jaw.
As a bonus, the video presents a fictional "literate dinosaur" called Thesaurus, which is said to have been eaten by tyrannosaurs.
Here are the key facts extracted from the text:
1. Liopleurodon was a giant marine reptile from the family of plesiosaurs that lived during the Middle Jurassic period.
2. Liopleurodon's average size varied from 4.8 to 7 meters, but the largest individuals reached 10 meters or more.
3. Liopleurodon was a predator that ate fish, squids, and smaller marine reptiles.
4. Liopleurodon had nostrils directed forward, indicating superiority, and long, flat flippers that allowed it to swim at great speed.
5. Arthra pleura was an extinct centipede that lived about 315 million years ago in what is now the northeast of North America and Scotland.
6. Arthra pleura's dimensions varied from 30 centimeters to two meters, and it had a body consisting of approximately 30 joints.
7. Arthra pleura was not a predator and ate plant foods.
8. Megalania was the largest land lizard in history, with fossils dating back 50,000 years.
9. Megalania lived in Australia until its extinction and was likely an active hunter.
10. Dunkleosteus was a giant fish that lived about 382 million years ago during the late Devonian period.
11. Dunkleosteus had a special jaw-opening mechanism that allowed it to fully open its mouth in 20 milliseconds.
12. Dunkleosteus did not have many teeth, but its powerful jaws allowed it to eat marine animals, including cannibalism between subspecies.
13. Jeholopterus was a giant predatory sea scorpion that lived during the early Devonian period.
14. Jeholopterus reached a size of almost two and a half meters and had sharp claws that it used to cut its prey.
15. Sarcosuchus was a distant relative of modern crocodiles that lived about 112 million years ago.
16. Sarcosuchus was almost twice as large as modern crocodiles and weighed up to 8 tons.
17. Gorgonops was a predator that lived about 260 million years ago and was characterized by its huge fangs and powerful legs.
18. Gorgonops was likely warm-blooded and had a small amount of fur.
19. Titanoboa was a giant snake that lived about 58-60 million years ago in what is now northeastern Colombia.
20. Titanoboa was the largest snake of all time, reaching almost 14.5 meters in length and weighing about 1,200 kilograms.
21. Meganeura was a giant dragonfly that lived during the Permian period.
22. Meganeura's wing length reached 33 centimeters, and its body length reached 43 centimeters.
23. Helicoprion was a fish with a spiral jaw that lived about 290 million years ago in the waters of North America, Eastern Europe, Asia, and Australia.
24. Helicoprion's jaw worked like a circular saw, cutting its victims into pieces.
25. Scientists believe that Helicoprion was not a shark but was closer to chimeras, a type of deep-sea fish.
Note: The last fact about the "literate dinosaur" is likely a joke and not a real fact.