Pandora is free, personalized radio that plays music you'll love. Discover new music and enjoy old favorites. Start with your favorite artist, song or composer and Pandora will create a custom station that plays similar tracks.
The Late Devonian mass extinction was one of the five largest mass extinction events in the history of life, said Professor Johnny Waters, who is a co-leader of the five-year, U.N. International Geoscience Programme project that began in 2011.
The five largest extinction events in earth's history since are these: 1  End of the Ordovician: 440 million years ago, 86% of all species lost, including graptolites. 2  Late Devonian: 375 million years ago, 75% of species lost, including trilobites.