It survived one major extinction occurred about 220 mya. Many non dinosaurs were wiped out during this time. However dinosaur did not survive another extinction occurred about 65 million years ago. W hat causes the extinction are still being debated by scientist as new clue was found. The location of the crater is about 3000 kilometres away from where most of dinosaurs skeleton were found.
Iridium is a rare mineral on earth but was common in comets.
The impact would have triggered a nuclear winter scenario that would have caused the death of the dinosaurs. T here are however some animals, insects and trees survived the extinction.