George Will: Out of catastrophe, renewal

Another result was the 'worldwide collapse of the climate and ecosystems' leading to the mass extinctions of the dinosaurs and two-thirds of marine animals, and the destruction of much of the planet's flora. So surmises Sankar Chatterjee of Texas Tech University.

Another result was the "worldwide collapse of the climate and ecosystems" leading to the mass extinctions of the dinosaurs and two-thirds of marine animals, and the destruction of much of the planet's flora. So surmises Sankar Chatterjee of Texas Tech University.

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