1. Scutosaurus was an armored parareptile that lived 250 million years ago and was 3 meters long.
2. Brontornis or the ‘terror bird’ lived in Argentina during the Miocene and stood 1.75 meters tall, but could raise its head to 2.8 meters!
3. Gorgosaurus, a relative of T. rex, possessed a unique set of serrated teeth that allowed it to slice through the flesh and bone of large prey with great efficiency. (Credit: Danielle Dufault)
4. A close relative of the elephant, Platybelodon had a strange ‘mouth-trunk’ and used its lower tusks to scrape trees (Credit: T Jedrzejowski)
5. The Quetzalcoatlus is one of the largest flying flying animals of all time. It had an average wingspan of 36 feet, was at least 10 feet tall at the shoulder, and weighed about 500 pounds.
6. Doedicurus clavicaudatus is an extinct giant armadillo from South America. They were 1.5 meters tall and 4 meters long! (Credit: opaleoblog, P. Riha)
7. Paraceratherium, second largest land mammal in history.
8.Atopodentatus was a three meter long herbivorous marine reptile that lived 247 million years ago. (Credit: Hyrotrioskjan)
9. Leptoptilos robustus, or the giant stork, is an extinct bird of prey from Flores. It grew up to 1.8 meters tall, weighed 16 kilograms, and fed on pygmy hominins.
10. Therizinosauridae or ‘reaper lizards’ had huge claws, but the purpose of these appendages is unclear. (Credit: Vlad Konstantinov)
11. The arandapsis was a primitive fish that did not have a jaw and a heavily armored body to prevent predation.
12. Albertonectes was a fish-eating plesiosaur with an incredible 76 neck vertebrae (compared to our 7!) (Credit: Julius Csotonyi)
13. Rodhocetus is an early whale that had short limbs with large, webbed hands and feet. (Credit: Pavel Riha)
14.Predator X or Pliosaurus funkei was a huge aquatic reptile and apex predator that may have been up to 15 meters long.
15. The sparassodont lived in South America and was not related to the saber-toothed tiger.
16. Extensive giant flying birds. (Photo: AMP)
17. Arambourgiania was one of the largest pterosaurs, with a wingspan of up to 13 meters! (Credit: Mark Whitton)
18. Spinosaurus was one of the largest predatory dinosaurs in history. This semi-aquatic predator lived during the Cretaceous period and measured 18 meters in length! (Credit: Franco Tempesta)
19. Kretzoiarctos beatrix is an extinct bear from Miocene Europe and the ancestor of the modern giant panda. (Credit: Nobu Tamura)
20. Gigantopithecus was the largest ape ever discovered, growing to 3.5 meters tall!
21. Dorudon are the ancestors of modern whales. They grew up to 5 meters long and possessed ‘hand fins’. (Credit: David Arruda Mourao)
22. Mamenchisaurus was 3 stories tall, weighed as much as 2 elephants, and had a neck longer than a bus! (Credit: Sergey Krasovsky)
23. Sigillaria was a 30 meter tall plant that did not reproduce through seeds, as deciduous and coniferous trees do today. It was a tree-like, spore-shaped plant that flourished in the Late Carboniferous Period. (Credit: Dinoraul)
24. The largest cormorant ever was the North Pacific Spectacled Cormorant. It grew to 1.2 meters tall and disappeared in 1850. (Credit: Joseph Wolf)
25. Pterodaustro was a flying dinosaur from the Cretaceous of South America. It had a strange set of teeth, similar to some whales, which were used to catch small organisms from the sea.
26. 26 Extinct Animals (Credit: RasmussenAlison)
27. Chasmosaurus was a dinosaur from the Late Cretaceous of North America. They were 5 meters long and weighed 2 tons. (Credit: Steve White)
28. Stratodus was a five meter long armored fish that looked like a sea serpent and lived 75 million years ago.
29. Australopithecus afarensis is an extinct hominin that lived 4 to 3 million years ago. Remains have been found in Africa and Germany.
30. Eurhinodelphis was a cetacean relative and predator from the early Miocene of what is now California. (Credit: Kano Serrano)
31. The Dickinsonia is a rare species from the Ediacaran. Scientists aren’t sure what it is, some suggest it could belong to fungi or some “extinct kingdom.” (Credit: Nobu Tamura)
32. Saber-toothed cats, like the world-famous Smilodon , died out in large numbers at the end of the Pleistocene, around 12,000 years ago. (Credit: Serge Elia)
33. Tylosaurus was an enormously large reptile hunter from the ancient seas. Tylosaurus holds the record for being one of the world’s most massive creatures to have swum in ocean waters.
34. Sarcoprion edax was a twenty-foot-long holocephalian (shark-like fish) from the Permian of Greenland. (Credit: deviantart/enneigard)
35. The Irish elk is one of the largest deer that ever lived. It had the largest antlers of any known cervid at 3.65 m from tip to tip. Its range extended from Ireland to Siberia and China.
36. 36 animals lost in history due to human activity. (Credit Alan Bernau Jr.)
37. Megaladapis, informally known as the koala lemur, is an extinct genus in the family Megaladapidae. When humans arrived in Madagascar, there were at least 17 species of now-extinct “giant” lemurs among the mammals that lived there, which included the Megaladapis.
38. The dodo bird hasn’t been seen since 1662, less than a century after it was first cataloged by Dutch navigators. This goofy-looking bird was driven to extinction by the sailors who discovered it and the invasive species they brought with them.
39. Kentrosaurus is a genus of herbivorous dinosaurs that lived about 150 million years ago. Its name is derived from the Latin word ‘Kentron’, which means sharp point. It lived on soft ground such as the banks of rivers or lakes.
40. Ankylosaurus! His brain was a little bigger than a walnut! The tongue of this creature was muscular and quite heavy; However, no one, to date, is sure why.
41. Carcharodontosaurus was closely related to Giganotosaurus. Although the creature was much larger than T. rex and Spinosaurus, its brain was smaller than the latter (making it less intelligent than Tyrannosaurus).
42. Avicranium was a dinosaur with a bird-like skull. They evolved long before the first birds. (Credit: Matt Celesky)
43. The Malagasy crowned eagle was a large bird of prey that hunted lemurs and became extinct as of 1500, after humans hunted its prey.
44. Cephalaspis is a prehistoric fish from the Early Devonian that ate rotting meat and feces.
45. The largest lobed fish that ever existed was a species called rhizodus, which grew to 7 meters long.
46. The heaviest dinosaur was Argentinosaurus with 77 tons. It was the equivalent of 17 African elephants. Argentinosaurus is a double prize winner, also being the longest dinosaur. It is also the largest land animal that ever lived.
47. Sphaerotholus buchholtzae is a species of Pachycephalosaurid from the Hell Creek Formation of the late Maastrichtian USA. Like many other pachycephalosaurs, its skull had a thick layer of bone raised to form a domed structure. (Those who have seen Jurassic World: Fallen Kingdom you already know)
48. This may be a small early Cretaceous carnivorous Dino, but this Paravian had 4 wings and is now believed to be able to achieve powered flight instead of simple gliding and to have feathered iridescence. (Source: Sean Southerland-Kirby)
49. The “Siberian unicorn”, actually an extinct giant rhinoceros, once roamed among humans
50. It is estimated that in 25 years, 28,000 species will become extinct due to deforestation. That’s more than 1,000 species per year.