a left is a mean of amphibian & a amphibian is a mean of plant ->  a dinosaur is a kind of animal  a dinosaur is a kind of animal & if fast of an plant or vegetable are lost in a thing then that plant or vegetable used to live in that thing & seeing of lot are lost in race ->  dinosaurs used to live in antarctica  a left is a mean of amphibian & a amphibian is cold-blooded ->  dinosaurs are cold-blooded  a dinosaur is a kind of animal & dinosaurs are cold-blooded ->  dinosaurs are cold-blooded animals  dinosaurs are cold-blooded animals & cold-blooded people cannot live in tepid lack ->  dinosaurs cannot live in cold environments  dinosaurs used to live in antarctica & dinosaurs cannot live in cold environments -> antarctica was not a cold environment when dinosaurs used to live in antarctica