Around 66 million years ago, the reign of the dinosaurs came to a fiery end. An asteroid about 7 miles (12 kilometers) wide, flying at 27,000 mph (43,000 km/h), slammed directly into Earth. The impact triggered a cascade of deadly events that led to the fifth mass extinction that eliminated dinosaurs, with the exception of some birds.
But what happened to the Mount Everest-size asteroid?
When it smashed into Earth “with the energy of about 8 billion times a World War II-era nuclear bomb, the asteroid basically vaporizes,” Sean Gulick, research professor and co-director of the Center for Planetary Systems Habitability at the University of Texas at Austin, told Live Science. The asteroid became “a fine dust that ends up in the upper atmosphere and rains down” over the entire planet.
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