What its species name means: Thylacinus cynocephalus means "dog-headed pouched dog." The Tasmanian tiger, also known as the thylacine or Tasmanian wolf, is an extinct carnivorous marsupial that once ...

Dinosaurs are the extinct relatives of birds that roamed the lands and seas of ancient Earth. They first appeared around 240 million to 230 million years ago in the Triassic Period, and went extinct ...

Where they lived: Dinosaur fossils have been found on every continent, including Antarctica. What they ate: Some ate plants, while others ate animals, including other dinosaurs. How big they were: The ...