Fear of huge asteroid impacts is a little similar to the fear of flying. The probability of anything happening is very small, but it's the vivid thought of such a catastrophic event happening that can make some of us magnify the probability in our minds leading us to have an irrational fear of such an event.

Thankfully, based on current calculations, the probability of a civilization-ending asteroid impact, like the one that killed off the dinosaurs 66 million years ago, is very low within our lifetimes. But how do we know this and what is the probability that we will see a large meteor impact?

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