This theropod's name means 'different lizard' — it was one of the earliest large predators.
What is Allosaurus?
Theropods were mostly meat-eaters, but some evolved to eat only this.
What are plants?
The term 'saurischian' refers to dinosaurs with this hip structure type.
What is lizard-hipped?
The Mesozoic Era is divided into three periods: Triassic, Jurassic, and this.
What is Cretaceous?
Fossils form most often when an organism is buried quickly by this.
What is sediment?
This dinosaur, whose name means 'iguana tooth,' was one of the first ever discovered.
What is Iguanodon?
Oviraptorids had strong beaks that could crack open hard-shelled foods like these.
What are shellfish?
Ceratopsian dinosaurs are defined by horns, a bony frill, and this parrot-like feature.
What is a beak?
Gondwana and Laurasia were two supercontinents that formed when this broke apart.
What is Pangaea?
'Jurassic Park' imagined extracting dinosaur DNA from insects preserved in this.
What is amber?
This raptor from Utah is one of the largest dromaeosaurs found in North America.
What is Utahraptor?
Hadrosaurs had dental batteries of hundreds of teeth for grinding tough this.
What are plants?
Stegosaurus' brain was roughly the size of this common nut.
What is a walnut?
The Hell Creek Formation preserves the very last dinosaurs before the extinction in these U.S. states.
What are Montana, the Dakotas, and Wyoming?
The K-Pg boundary is a thin layer of this rare element found worldwide, evidence of an asteroid.
What is iridium?
This Chinese dinosaur with four wings may have glided between trees.
What is Microraptor?
The predator-to-prey ratio tells us large carnivores were much rarer than this group.
What are herbivores?
Therizinosaurus' massive claws were likely used for pulling down branches, not this.
What is fighting?
Evidence suggests some polar dinosaurs experienced months of this during winter.
What is darkness?
Jack Horner's discovery of Maiasaura nesting grounds proved dinosaurs cared for their this.
What are young?
This massive marine reptile was the apex predator of Cretaceous seas — but NOT a dinosaur.
What is Mosasaurus?
Sauropods may have fermented plants in their gut, similar to modern cows — this process is called this.
What is fermentation?
Recent studies suggest T. Rex may have had lips covering its teeth, unlike this modern reptile.
What is a crocodile?
The Chicxulub crater is evidence of the asteroid impact that caused this extinction event.
What is the K-Pg extinction?
Soft tissue, including possible blood vessels, was found inside a T. Rex bone by scientist Mary this.
What is Schweitzer?