Forget the mass extinction event that wiped out the landlocked dinosaurs and 75 percent of all life – that was peanuts compared to the apocalypse that visited the world 252 million years ago. Colloquially known as the Great Dying, this wiped out as many as 96 percent of all species.
end partial quote from:http://www.iflscience.com/environment/worlds-greatest-mass-extinction-event-caused-volcani-climate-change/all/
That means that only 4% of the species of 252 million years ago were still alive in some form 65 million years ago when an asteroid from the Asteroid belt hit earth in the Gulf of Mexico?
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