Dinosaurs are very related to birds and reptiles. One evidence that dinosaurs are related to birds is the dinosaur named Archeopthyx. At first, I really don't know the spelling of this dinosaur. But this dinosaur has feathers. It has a beak-like mouth and has sharp teeth.
no they are not
99% of all organism who lived once are now extinct, so a list would be more than extensive! Dinosaurs are the big fossils. Mammal fossils are big too. Human and proto-human fossils may be the biggest things in fossils ever.
Actually, there ARE dinosaurs now; birds of all kinds are now classified as dinosaurs. They are actually more numerous than mammals!
Dinosaurs
Yes. Scientists have now determined that birds are dinosaurs. Other than that, no.
Dinosaurs.
dinosaurs
Dinosaurs were decomposed by the same types of organisms that decompose carcasses today, if they weren't scavenged to the bone by a different hungry dinosaur. Such organisms include insects, worms, and bacteria.
The dominant organisms in the Mesozoic Era were dinosaurs, which ruled the land, along with marine reptiles and ammonites in the oceans. In the later part of the era, mammals and birds began to diversify and emerge as important groups of organisms.
The most powerful reptiles used to be the dinosaurs, although now they would probably be things like crocodiles, alligators, and large snakes.
Birds are now classed as dinosaurs, but most dinosaurs were not birds. Neither dinosaurs nor birds are mammals.
Figuratively dinosaurs are still alive in animals such as Aligaters and Birds but if you mean like t-rexes and stuff like that it was about 300 millon years ago