This graph plots extinction rates of marine animal families over the last 600 million years. The shaded band indicates the normal range of extinction rates, known as "background extinction." ...

The fossil record presents many challenges, but the problem may be approached with combinatoric analysis, and graph and network theories. This paper is a brief introduction to the aspects of those ...

Here’s how it works. The worst mass extinction in Earth's history may have been caused by a supercharged El Niño cycle. New research suggests that an overload of carbon dioxide in the ...