An extinction event (also known as a mass extinction or biotic crisis) is a widespread and rapid decrease in the amount of life on earth. Such an event is identified by a sharp change in the diversity and abundance of macroscopic life. It occurs when the rate of extinction increases with respect to the rate of speciation.
All stories in Extinction event
Mass extinctions are very important to how life evolved on Earth. For example, when an asteroid hit the Earth 66 million ...