This enormous sauropod from Patagonia is currently considered one of the largest known dinosaurs.
What is Patagotitan?
Apex predators like T. Rex sat at the very top of this ecological structure.
What is the food chain?
Pneumatized bones with air pockets helped large dinosaurs by reducing this.
What is weight?
The K-Pg extinction event occurred approximately this many million years ago.
What is 66?
Cladistics is the method scientists use to classify dinosaurs based on shared this.
What are characteristics?
This Late Cretaceous tyrannosaur from Asia was a close relative of T. Rex.
What is Tarbosaurus?
Filter-feeding has been proposed for some ornithomimids, similar to modern ducks and these pink birds.
What are flamingos?
Fenestrae — openings in dinosaur skulls — reduced weight while maintaining this.
What is strength?
Impact winter — debris blocking sunlight — would have first killed off this group of organisms.
What are plants?
The 'Bone Wars' were a famous rivalry between paleontologist O.C. Marsh and this scientist.
What is Edward Drinker Cope?
This bizarre theropod from Mongolia had enormous claws and a pot-bellied body.
What is Therizinosaurus?
Isotope analysis of dinosaur teeth can reveal whether they ate plants from forests or open areas called this.
What are plains?
Preserved melanosomes in fossils have allowed scientists to determine this about feathered dinosaurs.
What is their color?
The Deccan Traps, massive volcanic eruptions in India, may have contributed to extinction alongside this event.
What is the asteroid impact?
Dinosaur Provincial Park in this Canadian province has one of the greatest fossil concentrations.
What is Alberta?
This ankylosaur's tail club could swing with enough force to shatter a predator's bones.
What is Zuul (or Ankylosaurus)?
Pack hunting in dromaeosaurs is debated — some scientists think they hunted alone, like this modern reptile.
What is a Komodo dragon?
Convergent evolution explains why pterosaurs, birds, and bats all independently developed this.
What is flight?
Fossils from Alaska's North Slope show some dinosaurs lived year-round in near-polar this.
What are latitudes (regions)?
The idea that dinosaurs were warm-blooded was championed by paleontologist Robert this.
What is Bakker?
Found in Germany, this early bird-like dinosaur is considered one of the first known birds.
What is Archaeopteryx?
Mesozoic food webs relied on ferns and conifers because these common modern plants had not yet evolved.
What are grasses?
The furcula, or wishbone, in theropods is direct evidence linking them to this modern animal group.
What are birds?
The 'fern spike' in the fossil record — a surge of fern pollen — is evidence of ecosystem recovery after this.
What is the mass extinction?
De-extinction targets species like woolly mammoths, but dinosaur DNA cannot survive beyond roughly this many million years.
What is 1-2 million years?