440 Million BC: The Gamma-Ray Burst That Almost Destroyed Earth

99% of all species that ever lived are gone. Are we next? In this deep-dive into Earth's violent history, we investigate the "Big Five" mass extinctions from the asteroid that incinerated the dinosaurs to the volcanic "mother of all extinctions" that nearly wiped out life on earth. Subscribe to Spark for more amazing science, tech & engineering videos: https://goo.gl/LIrlur 🚀 Join the Spark Channel Membership to get access to perks:    / @sparkdocs   You can now become a History Hit member right here on YouTube! Join for access to a new exclusive documentary every week, and access to over 160+ of our documentaries presented by world renowned historians like Dan Snow, Eleanor Janega, Tristan Hughes, Mary Beard, Matt Lewis and more. Get an exclusive release every week by signing up here: https://bit.ly/4pyExyn Any queries, please contact us at: [email protected] #Spark