Volcanoes and solar flares: Expert lists 5 natural cataclysms that ‘could happen tomorrow’

Despite being the only hospitable planet in the solar system, Earth can be a pretty dangerous place to inhabit. In its 4.5 billion-year history, the planet has gone through at least five major extinction events, the last of which struck about 66 million years ago. The so-called Cretaceous-tertiary extinction occurred when a 6.2 miles (10km) struck near the modern-day Yucatan Peninsula in Mexico.

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