The moon crashing into the planet would be an extinction level event.
The extinction of the dinosaurs occurred long before we were born.
the mammoths slowly went into extinction.
A meteor impact caused the extinction of the dinosaurs.
extinction of the Chinese alligator have been a big thing in china
I am not writing a sentence using that word.
I can give you a sentence using the word galaxy.
This is a sentence using the word aviator.
a sentence using the word endotracheal
The complete death and non existence of one species.
This is a sentence using the word monomer. :P
I am saying a sentence using the word collagen.
this is a sentence using the word armchair.
The lumberjack studied zoology so that he could identify the animals in the forest. Among the many studies in zoology is how to protect animal species from extinction.