| Hint | Answer | % Correct |
|---|---|---|
| Famous sail-backed synapsid from the Permian. | Dimetrodon | 69%
|
| The largest saber-toothed cat of all time. | Smilodon | 56%
|
| Large carnivorous marsupial that probably died out in the 20th century. | Thylacine | 50%
|
| The largest carnivorous dinosaur of all time. | Spinosaurus | 48%
|
| The tallest bird of all time. | Moa | 46%
|
| The Torosaurus might simply be a mature form of this well-known dinosaur. | Triceratops | 40%
|
| Ancient predatory whale initially believed to have been a sea serpent. | Basilosaurus | 39%
|
| Mesozoic marine reptiles known for their very long necks. | Plesiosaurs | 38%
|
| The human species that first learned to control fire. | Homo erectus | 37%
|
| Powerful canid that lived in the Americas until about 10000 years ago. | Dire wolf | 36%
|
| Mesozoic marine reptiles with dolphin-like shapes. | Ichthyosaurs | 36%
|
| Once the most abundant bird in the world, it died out in 1914. | Passenger pigeon | 36%
|
| Huge sirenian hunted to extinction by Europeans. | Steller's sea cow | 36%
|
| Small theropod known for its large brain; binocular vision and nimble fingers. | Troodon | 36%
|
| The "Velociraptors" of Jurassic Park were modeled after this dinosaur. | Deinonychus | 35%
|
| Group of carnivorous flightless bird of South America. | Terror birds | 35%
|
| The largest snake of all time. | Titanoboa | 35%
|
| Hoofed Eocene predator; one of the largest carnivorous land mammals ever. | Andrewsarchus | 33%
|
| Large armored mammal from pleistocene South America. | Glyptodon | 33%
|
| The largest land mammal of all time. | Paraceratherium | 33%
|
| The largest bear of all time. | Short-faced bear | 33%
|
| Monstrous pig-like creatures; have been called "hell pigs". | Entelodonts | 32%
|
| Dominant late Cretaceous marine reptiles. | Mosasaurs | 31%
|
| This theropod dinosaur had the longest claws of any animal ever. | Therizinosaurus | 29%
|
| The largest cartilaginous fish of all time. | Megalodon | 27%
|
| The largest ape of all time. | Gigantopithecus | 26%
|
| Diverse group of marine arthropods known throughout the Paleozoic. | Trilobites | 26%
|
| The largest turtle of all time. | Archelon | 25%
|
| Miocene sperm whale relative; owner of largest teeth ever. | Livyatan | 25%
|
| The former's short-necked relatives; powerful apex predators. | Pliosaurs | 25%
|
| Giant crocodilian from the early Cretaceous; possibly the largest ever. | Sarcosuchus | 25%
|
| A prime rival in size to the former, this time from the late Cretaceous. | Deinosuchus | 24%
|
| The earliest known dinosaur. | Eoraptor | 24%
|
| The largest of that group; a powerful apex predator. | Dunkleosteus | 23%
|
| Penguin-like aquatic toothed bird of the Cretaceous. | Hesperornis | 21%
|
| Huge proboscidean with downward-curving tusks on the lower jaw. | Deinotherium | 20%
|
| The largest pterosaur of all time. | Quetzalcouatlus | 20%
|
| Giant raptor relative; possibly the largest flying bird ever. | Argentavis | 19%
|
| The largest terrestrial lizard of all time. | Megalania | 19%
|
| This Pinta Island tortoise was for years the "rarest creature in the world". | Lonesome George | 18%
|
| The largest eagle of all time. | Haast's Eagle | 15%
|
| The largest known gorgonopsid. | Inostrancevia | 15%
|
| Shelled cephalopods extremely common in the Mesozoic. | Ammonites | 14%
|
| Recently discovered hominin that interbred with us and Neanderthals. | Denisovan | 14%
|
| This suborder of therapsids gave rise to mammals. | Cynodontia | 13%
|
| This smallish therapsid was the dominant land animal in the early Triassic. | Lystrosaurus | 12%
|
| The largest bony fish of all time. | Leedsichthys | 11%
|
| Class of armored fish from the Paleozoic. | Placodermi | 10%
|
| Group of extremely large seabirds with tooth-like points in their beaks. | Pseudotooth birds | 10%
|
| Predatory arthropod relative; possibly the largest creature of the Cambrian. | Anomalocaris | 8%
|
| The largest land invertebrate of all time. | Arthropleura | 7%
|
| Cambrian creature of unclear morphology; named for its dreamlike looks. | Hallucigenia | 7%
|
| Carboniferous dragonfly relative with a huge wingspan. | Meganeura | 7%
|
| Cephalopods with long, straight shells; abundant in the Paleozoic. | Orthocerida | 7%
|
| Supposed largest dinosaur of all time; known only from a single bone. | Amphicoelias | 6%
|
| Order of Paleozoic aquatic arthropods; some grew to gigantic sizes. | Eurypterida | 6%
|
| A famous Devonian fish with many tetrapod features. | Tiktaalik | 6%
|
| Order of rodent-like mammals that thrived from Jurassic to Oligocene. | Multituberculata | 5%
|
| Group of amphibians named after their peculiar tooth structure. | Labyrinthodontia | 2%
|
| This locust formed the largest swarms known; died out in early 20th century. | Rocky Mountain locust | 2%
|