Mass Extinction: Life at the Brink

At least five times before, life on Earth has been at risk as great extinction crises have wiped out a majority of Earth's species. In this powerful documentary, we investigate what really happened and why these catastrophic events occurred. We reveal new discoveries that pinpoint how massive volcanic eruptions caused the greatest mass extinction ever. We'll also explore what these lessons from the past may tell us about our world today. Are we on the brink of a sixth mass extinction? (Viasat)