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Friday, March 5, 2010
Violent Planet: The Forces That Shape Earth
From Live Science:
Earth is a violent planet, and always has been. In fact it is much calmer today than in the past. As the planet continues to cool – 4.5 billion years after it formed – what was once likely a lava world has become a temperate planet that's two-thirds covered by water and hospitable to life.
But recent events and new research show that the geologic havoc is far from over.