Problem 12

Background and context

An extinction event  is a widespread and fast loss of life on Earth. Extinction happens at a different rate for different species. Because of its greater fossil record and geographical range when compared to land creatures, marine fossils are commonly employed to determine extinction rates. Extinction is a phenomenon that occurs in a wide range of settings and lifestyles. The extinctions happened quickly (over millions of years) and were caused by one or more physical forces.