the dodo :}
Extinct (Extinction)
By the way they look, (their bone structure, body weight) and DNA too.
so it does not get extinct
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.
Organisms such as dinosaurs, dodo birds, and woolly mammoths are extinct and will not reappear on Earth. However, it is possible that through cloning or other advanced technologies, we may be able to bring back some extinct species in the future.
"Examples of organisms in the starfish?"
The are examples of stromatolites still living. They are not extinct.
Aliens
alive
Biogeography
They become extinct.
Some examples of organisms that no longer exist today include dinosaurs, woolly mammoths, and passenger pigeons. These species have gone extinct either due to natural causes or human activities.