El Nino, Volcanoes Caused Mass Extinction on Earth Millions of Years Ago

New research suggests that a powerful El Niño cycle, fuelled by a massive release of carbon dioxide, may have contributed to Earth’s largest mass extinction around 250 million years ago, during the end of the Permian period. Volcanic eruptions in what is now Siberia caused enormous amounts of carbon dioxide to enter the atmosphere, resulting in drastic climate changes. These shifts led to the extinction of 90 percent of species on Earth….