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When Species Die
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Five mass extinctions have occurred since life began on Earth. Are humans causing the next mass extinction? And what does evolutionary theory predict for the world we will leave to our descendants?

what killed the dinosaurs? What Killed the Dinosaurs?
Find clues to one of life's great mysteries.
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A Modern Mass 
            Extinction? A Modern Mass Extinction?
Are we in the midst of one? And if so, did we trigger it?
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Show 3: Extinction!

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