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 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 ...
Mass Extinctions
Hank takes us on a trip through time to revisit the 5 major mass extinction events that have impacted species over the Earth's history, and leaves us with so...
Today's Mass Extinction, and the First See-Through Animal
Are we in the middle of the 6th largest extinction event? What can we do? Let Hank explain and tell us about see-through animals! ---------- Like SciShow? Wa...
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 ...
Ordovician Extinction [4]: 7 worst days on Planet Earth
The Ordovician--Silurian extinction event, the Ordovician extinction, was the second-largest of the five major extinction events in Earth's history in terms ...
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...
Mass Extinction Event
An extinction event (also known as: mass extinction; extinction-level event, ELE) is a sharp decrease in the number of species in a relatively short period o...
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...
Study says Earth on brink of mass extinction event
Subscribe: http://smarturl.it/reuterssubscribe June 18 - A landmark study by an international group of scientists has concluded that planet Earth is on the b...