Largest known mass extinction

Permian - Triassic Mayhem: Earth's Largest Mass Extinction
Royal Tyrrell Museum Spealer Series 2013 Beniot Beauchamp, Ph.D. - University of Calgary Permian - Triassic Mayhem: Lead-up, Catastrophe and Aftermath of the...
The Permian Extinction (Majernik, Green, and Kinsala) .dv
The Permian Extinction is the largest known mass extinction event in Earth's history. This video explores the causes behind the Permian Extinction and lays o...
The Sixth Extinction - Elizabeth Kolbert on How Humans Are Causing Largest Die Off
February 2014 on Democracy Now! In the history of the planet, there have been five known mass extinction events. The last came 65 million years ago, when an ...
The Sixth Extinction: Elizabeth Kolbert on How Humans Are Causing Largest Die-Off Since Dinosaur Age
http://www.democracynow.org - In the history of the planet, there have been five known mass extinction events. The last came 65 million years ago, when an as...
Could Siberian volcanism have caused the Earth's largest extinction event?
Around 250 million years ago, at the end of the Permian geologic period, there was a mass extinction so severe that it remains the most traumatic known speci...
The Sixth Extinction: Elizabeth Kolbert on How Humans Are Causing Largest Die Off Since Dinosaur Age
In the history of the planet, there have been five known mass extinction events. The last came 65 million years ago, when an asteroid about half the size of ...
The Siberian Traps and the Volcanic Mass Extinction Theory (Full Documentary)
The Siberian Traps and the Volcanic Mass Extinction Theory (Full Documentary) . 2013 This documentary as well as the rest of these documentaries shown here r...
Were Dinosaurs Undergoing Long-Term Decline Before Mass Extinction?
A talk by Nirmal Rajah. Organised by Chennai Freethinkers, a regional group of Nirmukta. Note: A significant portion of this video is in Tamil. It will be su...
The Siberian Traps and the Volcanic Mass Extinction Theory (Full Documentary)
The Siberian Traps and the Volcanic Mass Extinction Theory (Full Documentary) . 2013 This documentary as well as the rest of these documentaries shown here r...
Could An Asteroid Impact Event Cause Mass Extinction on Earth ?
The possibility of a cosmic impact on the planet Earth is examined. An impact event is a collision between celestial objects causing measurable effects. Impa...