10 Ways the World is Going to End

In recent geological history, Earth has been hit by several large asteroids. Dinosaurs are most likely to have been killed by an asteroid 65 million years ago. If one hit Earth, it is more than linkely that Eall humanity would die. For humanity to be completely destroyed, a meteor would have to be 1 km in diameter–on average, a 1 km meteor hits Earth once every 500,000 years.

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