an annoying addition to this fact: all dinosaurs are classified as either ornithischian ("bird-hipped") or saurischian ("lizard-hipped"). birds are dinosaurs, but they are specifically lizard-hipped dinosaurs.
Kory BingLots of people replying/quoting this with jokes about dinosaurs/jurassic park/etc and it’s a good time for a favorite fun fact: all birds are literally a branch of theropod dinosaurs that split off from other theropods in the Jurassic period. They look like dinosaurs because they are dinosaurs.