You have a minor misspelling in the following sentence:
Dinosaurs evolved soon after the Permian extinction, which was the biggest mass extinction that ever occured on Earth.It should be occurred instead of occured.
You have a minor misspelling in the following sentence:
Dinosaurs evolved soon after the Permian extinction, which was the biggest mass extinction that ever occured on Earth.It should be occurred instead of occured.
Thanks for update.