Using a new method of statistical analysis, scientists discovered a previously unidentified mass extinction event
New mass extinction that occurred 232 million years ago identified - science news in summary

In the history of Earth, there have been many mass extinction events. Many of them there are easy to identify in the geological records, however, others are more difficult to spot. Using a new type of statistical analysis (breakpoint analysis) a team of scientists has discovered a previously unknown mass extinction event. According to the study, this event occurred 232 million years ago, during the Triassic. Called the Carnian event, this extinction was important in heralding the explosion of dinosaurs onto the scene, but it also marked the beginning of many modern groups, such as turtles, crocodiles, lizards, and mammals.

Read the full story: University of Bristol
Scientific publication: Journal of the Geological Society