By Associated Press Undefined BEIJING (AP) — The world's highest mountain is now officially a little higher, and that might not be the end of the story. China and Nepal agreed this week on a new standard height for Mount Everest, the rugged Himalayan peak that straddles their border. As definitive as that sounds, geological changes, the complicated business of measuring a mountain and varying criteria for determining the world's highest peak will likely ensure the question isn't settled for good. GEOLOGICAL UPS AND DOWNS The mountain's height changes. The movement of tectonic plates can lift it up ever so […]

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