permian period :
Search Words
News & Articles
- Report: Acid raid, ozone depletion contributed to ancient extinction
Around 250 million years ago, at the end of the Permian period, there was a mass extinction so severe that it remains the most traumatic known species die-off in Earth's history. Some researchers have suggested that this extinction was triggered by contemporaneous volcanic eruptions in Siberia. read more
Nov. 26, 2013 - TG Daily