7 of the Strangest Extinct Creatures That Have Been Discovered

Also known as Tasmanian Tiger or Tasmanian Wolf. Extinct carnivorous marsupial native to Australia, Tasmania, and New Guinea. Mainly nocturnal, preying on kangaroos and smaller mammals.

Thylacine (Tasmanian Tiger)

Extinct giant ground sloth found in South America (M. americanum). Enormous claws, walked on sides of feet due to claw length. Could walk on hind legs, standing at 12 feet tall.

Megatherium (Giant Ground Sloth)

Worm-like creature from 500 million years ago. Belonged to lobopodians, lived deep underwater. Uncertain diet, possibly fed on sponges using clawed legs. Coined in 1977, named for "dreamlike" appearance.

Hallucigenia (Lobopodian)

Extinct giant shark with huge jaws. Could open mouth wide enough to swallow two adult humans. Fed on whales, large fishes, and possibly other sharks.

Megalodon (Supersized Mackerel Shark)

Largest known flying animals, lived over 67 million years ago. Dominated skies in what is now Texas. Size of giraffes, with an 11-meter wing span. Likely hunted like a large heron, preying on fish and aquatic prey.

Quetzalcoatlus (Largest Flying Animals)

Extinct genus of apes from southern China. Went extinct 295,000 to 215,000 years ago. Recent research solved mystery of its disappearance.

Gigantopithecus blacki (Extinct Ape)

Also known as saber-toothed tiger. Lived in America about 100,000 years ago. Carnivores with long canine teeth for stabbing prey. Extinct approximately 10,000 years ago.

Smilodon (Saber-toothed Tiger)