Inferno

S1, E1: 252 million years ago, the most devastating mass extinction of all time abruptly wiped out around 90% of all species on Earth. The biggest volcanic eruptions the world had ever seen, emitted some 700 thousand cubic miles of magma and rock. The event, now called The Great Dying, came close to wiping out all life on the planet. How did the surviving organisms avoid this apocalypse?