Here’s what it would look like if a cataclysmic event were to happen on planet Earth tomorrow. Earth is pretty resilient having survived several major mass extinctions. The most recent, the Cretaceous-Paleogene extinction some 66 million years ago. But what if an asteroid with a diameter of 310 miles wide landed in the Pacific Ocean in this day and age? 7 billion people inhabit the planet today. If it took at least 90-95% of life — as it did with the “Great Dying” — over 5 billion people would vanish into ash and fire.