How are mass extinction and mass extinction related?

Extinction is the complete disappearance of a species from life. No more of that species is alive on the planet. It happens all the time; the normal rate of extinctions is called the background...

When large numbers of species die out in a very short period of time.

When many species die out at once due to a large catastrophe, such as an asteroid impact of the depletion of atmospheric oxygen/carbon dioxide .

Yes I believe that fish could possibly cause mass extinctions. The rise of any species or family of animals or plants can cause mass extinctions. Grass had this effect when it flourished after the...

There have been many mass extinctions throughout the history of the Earth. Probably the most famous is the extinction that finally saw the end of the dinosaurs reign on the Earth, 65 million years...