Jens-Christian Svenning, a tall, crazy-golf-playing scientist from Aarhus University in Denmark, worked out that as many as thirty-one genera of trees that were native to Europe between 5.3 and 2.6 million years ago have since become extinct, whereas thirty-five have survived in the region. If you had taken a grand tour of Europe 3 million years ago, you would have encountered double the diversity of native trees.

-Chris D. Thomas

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