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The Earth is not fragile at all; it's a ball of rock 8000 miles in diameter. The Earth has withstood lightning, hail, rain, erosion, earthquakes, meteors, nuclear weapons and collisions that have shaken the planet to its core. It has been fried in the radiation of nearby supernova stars. It's still here after 4,500,000,000 years.

Perhaps you are thinking of life on the planet. This also is pretty tough stuff. Life emerged here on Earth about 2.5 billion years ago, and has withstood everything that the universe could throw at it. On four occasions, planetary disasters have come close to sterilizing the entire world, but we're here now.

If/// WHEN another planetary disaster occurs - and over the next 200 million years, we can be assured that a couple will! - then the human race may or may not survive on the Earth. But life will. And if we're as smart and as tough as we'd like to think we are, then humanity will, too.

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16y ago

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